The Orchid review (Orchid Review ltd.], 1910)

The Orchid review (Orchid Review ltd.], 1912)

The Orchid review (Orchid Review ltd.], 1921)

Orchid, rotted and azalea peats, leaf mould, live sphagnum moss for orchids, baled sphagnum moss, green clump moss, etc., etc - Brownell, C.W. & Co. (C.W. Brownell & Co, 1908)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1911)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1912)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1913)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1914)

The Orchid world. A monthly illustrated journal entirely devoted to orchidology - Wilson, Gurney, 1878 - (Alabaster, Passmore & Sons, ltd., printers], 1915)

Orchideeën welke in Ned.-Indië gekweekt kunnen worden - Dakkus, P. M. W. (A. C. Nix, 1935)

Die Orchideen :ihre Beschreibung, Kultur und Zu¨chtung. Handbuch fu¨r Orchideenliebhaber, Zu¨chter und Botaniker - Schlechter, Rudolf, 1872 -1925 (P. Parey, 1915)

Orchids - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Edward A. Manda, Incorporated, 1937)

Orchids - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Thomas C. Kirkwood, Inc, 1929)

Orchids, 1930 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Orchidwood, 1930)

Orchids, 1932 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Orchidwood, Inc, 1932)

Orchids - O'Brien, James (T.C. & E.C. Jack, 1911)

Orchids - O'Brien, James (T. C. & E. C. Jack, 1911)

Orchids for everyone - Curtis, Charles H. (J.M. Dent, 1910)

Orchids for the California amateur - Butterfield, H. M. (Harry Morton), 1887 -1970 (University of California, College of Agriculture, Agricultural Experiment Station and Extension Service, 1955)

The orchids in the Ottawa District : floristics, phytogeography, population studies and historical review / Joyce M. Reddoch and Allan H. Reddoch - Ottawa Field-Naturalists' Club (The Ottawa Field-Naturalists' Club, 1997)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1909)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1910)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1914)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1915)

Orchis :Monatsschrift der Deutschen Gesellschaft für Orchideenkunde - Dammer, Udo. (1920)

Organic remains of a former world : an examination of the mineralized remains of the vegetables and animals of the Antediluvian world; generally termed extraneous fossils - Parkinson, James, 1755 -1824 (M.A. Nattali, 1833)

Organic remains of a former world. An examination of the mineralized remains of the vegetables and animals of the antediluvian world; generally termed extraneous fossils - Parkinson, James, 1755 -1824 (Sherwood, Neely and Jones, etc, 1811)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1898)