BPH
Opuntia pad. Leicester. 1972+. Opuntia Pad. HI 69200
Opuscula botanica pharmaciae complutensis. Madrid. Vols. 1-5, 1977-89; 2nd ed., 1987-?. Opusc. Bot. Pharm. Complut. Superseded by: Rivasgodaya. ULS reference. ISSN 0213-5361 HI 69201
Opuscules, Institut des Fruits et Agrumes Coloniaux. Paris. No. ?-2-11-?, ?-1952-? Opusc. Inst. Fruits Agrumes Colon. HI 69203
Opuscula omnia actis eruditorum Lipsiensibus inserta, quae ad universam mathesim, physicam, medicinam, anatomiam, chirurgiam et philologiam pertinent; nec non epitomae si que materia vel criticis animadversionibus celebriores. Venice. Vols. 1-7, 1740-46. Opusc. Omnia Actia Erud. Lips. Inserta. ULS 1-53-2. HI 79345
Opuscula Philolichenum. Philadelphia, PA, later Bronx, NY. Vol. 1+, 2004+. Opusc. Philolichenum. ISSN 1941-7519 (Print), 1941-7527 (Online) HI 84636
Opusculi scelti sulle scienze e sulle arti, tratti, e degli atti della Accademia e dalle altre collezione filosofiche e letterarie e dalle opere più recenti. Milan. Vols. 1-23, 1778-1803. Opusc. Scelti Sci. Arti. Preceded by: Scelta di opuscoli interessanti tradotti di varie lingue. Turin. Superseded by: Nuova scelta d'opuscoli interessanti sulle scienze e sulle arti. Milan. ULS 4-3189-1. HI 57731
Opuscoli scientifici d'una Società di professori della Pontifical Università di Bologna. Bologna. Vols. 1-4, 1817-23; n.s., 1824-25. Opusc. Sci. Superseded by: Nuova collezione d'opuscoli scientifici. Bologna. ULS 1-735-1. HI 57732
Opuscula sparsa. Barcelona. Vol. 1+, 1970+. Opusc. Sparsa. HI 69202
Opyt kul'tury novykh syr'evykh rastenii. Tashkent. Vol. 1+, 1973+. Opyt Kul't. Nov. Syr'ev. Rast. HI 69204
Opytnaya agronomiya. Moscow. 1941. Opytn. Agron. Preceded and superseded by: Sovetskaya agronomiya. Moscow. HI 79693
Oral microbiology and immunology. Copenhagen. Vol. 1+, 1986+. Oral Microbiol. Immunol. ULS reference. ISSN 0902-0055 HI 81366
Orange Judd American agriculturist. New York, NY. Vols. 89(21)-107(21), 1912-21. Orange Judd Amer. Agric. Preceded and superseded by: American agriculturist. Ithaca, NY. HI 59180
Orchadian. Sydney, N.S.W. Vol. 1+, 1963+. Orchadian. HI 57733
Orchard and farm. Los Angeles, CA. Vols. 1-36, 1888-1924. Orchard & Farm. HI 80089
Orchard and garden. Little Silver, NJ. Vols. 7(10)-14, 1886-92. Orchard & Gard. Preceded by: Wine and fruit grower. Little Silver, NJ. ULS 4-3190-2. HI 57734
Orchard and nursery inspection bulletin, Michigan. Lansing, MI. 1922?-53? Orchard Nursery Inspect. Bull., Michigan. HI 80523
rchard and nursery inspection bulletin, Michigan. Lansing, MI. 1922?-53? Orchard Nursery Inspect. Bull., Michigan. HI 80523
Orchardist of New Zealand. Wellington. Vol. 1+, 1928+. Orchardist New Zealand. ULS 4-3190-2. HI 57735
Orchardist's companion; a quarterly journal devoted to the history, character, properties, modes of cultivation and all other matters appertaining to the fruits of the United States. Philadelphia, PA. Vol. 1, 1841. Orchardist's Companion. Superseded by: Hoffy's orchardist's companion. Philadelphia, PA. ULS 3-1869-2. HI 57736
Orchid adventures. official journal, Cymbidium Society of America. Santa Barbara, Arcadia, Carpentaria, CA Vol. 1(1-3), 2000. Orchid Advent. Preceded by: Orchid advocate; HI 79737
Orchid advocate; official journal, Cymbidium Society of America. Santa Barbara, Arcadia, Carpentaria, CA. Vols. 1-25, 1975-99. Orchid Advocate. Preceded by: Cymbidium Society news. Superseded by: Orchid adventures. ULS reference. ISSN 0097-9546 HI 69205
Orchid album; comprising coloured figures and descriptions of new, rare, and beautiful orchidaceous plants. London. Vols. 1-11, 1882-97. Orchid Album. ULS 4-3190-3. HI 57737
Orchid biology; reviews and perspectives. Ithaca, NY, London. Vol. 1+, 1977+. Orchid Biol. HI 69206
Orchid digest. Berkeley, Carmichael, CA. Vol. 1+, 1937+. Orchid Digest. ULS 4-3190-3. ISSN 0199-9559 HI 57738
Orchid hunter newsletter. Pittsburgh, PA. 1988+. Orchid Hunt. Newslett. HI 81367
