- Harrison, Miss,
- Harrison, Miss.
- Harrison, William Jerome, 1845-1909
- Harrison, Wm. H.
- Harrison-Nelson, Elizabeth B.
- Harrison's Nurseries (Berlin, Md.)
- Harrisons' Nurseries (Berlin, Md.)
- Harrisox, Launcelot
- Harriss, Robert C
- Harrisson, C M H
- Harrisson, Christopher M H
- Harrisson, T
- Harrisson, T H
- Harrod, Chris
- Harrod, R J
- Harrod, Richy J
- Harrod, Richy J.
- Harrod, Robert L.
- Harrold, C G
- Harrold's Pansy Gardens (Grants Pass, Or.)
- Harrold's Pansy Gardens.
- Harrop, Edward D
- Harrow School Scientific Society.
- Harrow, Benjamin, 1888-1970
- Harrow, S.
- Harrower, Colin
- Harrower, Emma
- Harrower, Henry D.
- Harrower, Henry R. (Henry Robert), 1883-
- Harrower, Henry Robert, 1883-
- Harry A. Bunyard Co.
- Harry Adam Bunyard (Firm)
- Harry C. Lindholm (Firm)
- Harry Chaapel (Firm)
- Harry Deam (Firm)
- Harry E. Ruble & Son,
- Harry E. Ruble & Sons.
- Harry E. Saier Co.
- Harry F. Buckman (Firm)
- Harry Franklin Baker (Firm)
- Harry Haas (Firm)
- Harry Houdini Collection (Library of Congress)
- Harry Johnson (Firm)
- Harry L. Holmes (Firm)
- Harry L. Holmes (Harrisburg, Pa.)
- Harry L. Squires (Firm)
- Harry L. Stinson (Firm)
- Harry N. Hammond (Firm)
- Harry N. Hammond Seed Co.
- Harry O. Thumma and Earl H. Wagner (Firm)
- Harry R. Marlow & Co.
- Harry S. Westmacott (Firm)
- Harry Thomas (Firm),
- Harry, H W
- Harry, Harold W
- Harry, Hw
- Harry, Ingmar
- Harry, Joseph Edward, 1863-
- Harry, Robert R
- Harry, Scott G.
- Harry, William Cleaver, 1879-
- Harsant, Wendy J
- Harsch, Mary
- Harsch, R M
- Harsh, John W
- Harsh, R
- Harshbarger, John C., 1936-
- Harshbarger, K. E.
- Harshberger, John W. (John William), 1869-1929
- Harshberger, Review By: J W
- Harshberger, Review By: John W
- Harshey, D K
- Harshini, Vemula
- Harshman, W. W.
- Harsuny, Georg, 1867-
- Hart & Barber Avocado Co.
- Hart & Vick, Inc.
- Hart Pioneer Nurseries.
- Hart, A. A.
- Hart, Arthur C.
- Hart, B
- Hart, Bertrand K
- Hart, C
- Hart, C W
- Hart, Capt
- Hart, Catherine E
- Hart, Charles A
- Hart, Colin
- Hart, D G
- Hart, D R
- Hart, E B
- Hart, E Blake
- Hart, E. B. (Edwin Bret), 1874-1953
- Hart, Earl W.
- Hart, G. H. (George Hart), 1883-1959
- Hart, George B.
- Hart, George E.
- Hart, George H.
- Hart, George H.,
- Hart, George.
- Hart, Heidi.
- Hart, Henk 't
- Hart, Henry Chichester, 1847-1908
- Hart, Henry Martyn.
- Hart, Horace, 1840-1916
- Hart, Ivor Blashka, 1889-
- Hart, J
- Hart, J A
- Hart, J H
- Hart, J M
- Hart, J S
- Hart, J W
- Hart, James A.
- Hart, Jeffrey A
- Hart, Jennifer
- Hart, Jennifer M
- Hart, John
- Hart, John F
- Hart, John Hinchley, 1847-1911
- Hart, John Lawson
- Hart, John P.
- Hart, John P.
- Hart, Josephine F L
- Hart, Kimberly Hamblin
- Hart, Kirk A
- Hart, Kristen
- Hart, L 't
- Hart, Leslie.
- Hart, Ludovic 1836-1919
- Hart, Ludovico Wolfgang
- Hart, M W
- Hart, Malcolm B
- Hart, Melissa (Ecologist),
- Hart, Melissa,
- Hart, Melissa.
- Hart, Michael W
- Hart, Michelle L
- Hart, P J
- Hart, Pamela
- Hart, R
- Hart, R P
- Hart, R. A. (Richard Ambrose), 1884-
- Hart, R. H. (Richard H.)
- Hart, Raymond P.
- Hart, Richard C
- Hart, Roz
- Hart, Simon
- Hart, T J G
- Hart, T S
- Hart, T W
- Hart, The Late R P
- Hart, Thomas P
- Hart, Thomas Stephan
- Hart, Thomas Stephen
- Hart, W. L.
- Hart, W.G.
- Hart, William Henry Harrison, 1848-
- Hart, William L.
- Hart, William Matthew, 1830-1908
- Hart, William W., taxidermist.
- Hartana, A
- Hartana, Alex
- Hartard, Britta
- Hart-Davis, Henry Vaughan.
- Hartdegen, Carl,
- Hartdégen, Judit
- Harte, C R
- Harte, H.B.
- Harte, M E
- Harte, Mary E
- Harteet, Ernst
- Hartel, Handrij
- Hartel, K E
- Hartel, Karsten
- Hartel, Karsten E.
- Härtel, Steffen
- Hartel, Tibor
- Hartell-DeNardo, Julie
- Hartely, Thelma
- Harten, Antonius van.
- Härtenberger, Guido
- Hartenberger, Jean-Louis
- Härter, Eduard
- Harter, Ira H.,
- Harter, L I
- Harter, L. L. (Leonard Lee)
- Harter, Leonard Lee, 1875-
- Harter, Samuel G. (Samuel George), 1910-1980
- Harter-Marques, Birgit
- Harterreiten-Souza, Érica Sevilha
- Hartert, Dr E
- Hartert, Ernst, 1859-1933
- Hartert, Eunst
- Hartert., Ernst
- Hartesveldt, Richard J
- Hartfield, Deborah
- Hartfield, P
- Hartford Agricultural Warehouse and Seed Store.
- Hartford Farms (Hartford, Mich.)
- Hartford Fire Insurance Co
- Harthlaub, G
- Harthman, Vanessa de Carvalho
- Hartig, Ben C.
- Hartig, F
- Hartig, Georg Ludwig, 1764-1837
- Hartig, Heinrich Julius Adolph Robert
- Hartig, Robert, 1839-1901
- Hartig, Theodor, 1805-1880
- Harting, Albert L.
- Harting, James Edmund, 1841-1928
- Harting, M
- Harting, M P
- Harting, M. G.
- Harting, Pieter, 1812-1885
- Hartinger, Anton, 1806-
- Hartini, Sri
- Hartl, Günther
- Hartl, Günther B
- Hartland, Edwin Sidney, 1848-1927
- Hartland-Rowe, Richard C. B 1927-
- Hartlaub, Clemens 1858-1927
- Hartlaub, Gustav, 1814-1900
- Hartlaub., G
- Hartless, C S
- Hartley, Alfred,
- Hartley, C H
- Hartley, Carl (Carl Pierce), 1887-
- Hartley, Carl.
- Hartley, Cecil B.
- Hartley, Christopher S
- Hartley, D H
- Hartley, Dustin J.
- Hartley, George Inness, 1887-
- Hartley, Helen
- Hartley, Joel
- Hartley, John P
- Hartley, Matt
- Hartley, Oliver.
- Hartley, R R
- Hartley, Renee-Claire
- Hartley, T G
- Hartley, Thelma
- Hartley, Thomas
- Hartley, Thomas G
- Hartlib, Samuel, 1662
- Hartline Nursery.
- Hartline, D K
- Hartline, Daniel K
- Hartman Stock Farm (Columbus, Ohio). Horse Dept.
- Hartman, Carl