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- Hartman, Carl Johan
- Hartman, Carl Johan, 1790-1849
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- Hartman, Olga, 1900-1974
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- Hartman, Ray D.
- Hartman, Raymond Daniel, 1892-
- Hartman, Richard T.
- Hartman, Robert L
- Hartman, Ronald L
- Hartman, Ronald L.
- Hartman, Scott A
- Hartman, W D
- Hartman, W., fl 1823-
- Hartman, William Dell, 1817-1899
- Hartmann, A
- Hartmann, August
- Hartmann, B. G. (Bernard George), 1873-
- Hartmann, Eduard von, 1842-1906
- Hartmann, F
- Hartmann, Frans Xaver, Ritter von
- Hartmann, Franz Xaver, 1737-1791
- Hartmann, Franz, 1912
- Hartmann, G C
- Hartmann, Georg Leonhard, 1764-1828
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- Hartmann, H. Moritz.
- Hartmann, Hudson Thomas, 1914-
- Hartmann, J. D. W. (Johann Daniel Wilhelm), 1793-1862
- Hartmann, J. D. Wilhelm, 1793-1862
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- Hartmann, M J
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- Hartmann, Marilia T.
- Hartmann, Marília T.
- Hartmann, Marília Teresinha
- Hartmann, Martin
- Hartmann, Max
- Hartmann, Max, 1876-1962
- Hartmann, Otto.
- Hartmann, Paulo A
- Hartmann, Paulo A.
- Hartmann, Paulo Afonso
- Hartmann, Robert, 1832-1893
- Hartmann, Rudolf.
- Hartmann, Thomas
- Hartmann, Volker
- Hartmann, Wolffgang, 1663
- Hartmann's Plantation,
- Hartmann-Schroder, G
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- Hartmeyer, R
- Hartmeyer, Robert Heinrich Hermann
- Hartmeyer, Robert, 1874-1923
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- Hart's Lynbrook Nurseries.
- Hart's Nursery.
- Harts, William Wright, 1866-
- Hartschen Nursery And Landscaping Service,
- Hartsell, T D
- Hartshorne, Henry
- Hartsock, John K.
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- Hartsog, William S.
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- Hartt, Charles Frederick, 1840-1878
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- Hartung, Georg, 1822?-1891
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- Hartung, W J
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- Hartwell Nurseries.
- Hartwell Pecan Nurseries.
- Hartwell, Edward Mussey.
- Hartwell, Marjorie B.,
- Hartwell, Michael G.
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- Hartz, Sandra Maria
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- Harutyunova, Maria
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- Harvard Class of 1864
- Harvard College
- Harvard College Library
- Harvard Commencement Chief Marshal
- Harvard Cooperative Society
- Harvard Evergreen Nurseries.
- Harvard Forest (Research facility)
- Harvard Institute for Tropical Biology and Medicine.
- Harvard Office of the President
- Harvard President and Fellows
- Harvard Quinquennial Catalogue
- Harvard Treasurer's Office
- Harvard University.
- Harvard University. Botanic Garden.
- Harvard University. Botanical Museum.
- Harvard University. Bureau of vocational guidance.
- Harvard University. Bussey Institution, Jamaica Plain. Laboratory of Genetics
- Harvard University. Center for Earth and Planetary Physics.
- Harvard University. Department of Tropical Medicine.
- Harvard University. Dept. of Mollusks.
- Harvard University. Farlow Library.
- Harvard University. Gray Herbarium.
- Harvard University. Museum of Comparative Zoology.
- Harvard University. Museum of Comparative Zoology. Bird Dept.
- Harvard University. Museum of Comparative Zoology. Department of Mollusks.
- Harvard University. Museum.
- Harvard University. Department of Philosophy
- Harvell, C Drew
- Harvest Lane Iris Garden,
- Harvey and Co. (Dublin) Ltd.
- Harvey B. Snow (Firm)
- Harvey Seed Co.
- Harvey Seed Co. (Montgomery, Ala.)
- Harvey Society of New York
- Harvey Whipple (Firm)
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- Harvey, Mark S.
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- Harvey, Martin C.
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- Harvey, Michael B.
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