BPH
Circular, Office of Experiment Stations, United States Department of Agriculture. Washington, DC. Nos. 1-188, 1889-1913 [nos. 6, 9, 10 were not printed]. Circ. Off. Exp. Sta. U.S.D.A. HI 64246
Circular, Office of the Secretary, U S Department of Agriculture. Washington, DC. Nos. [1-2] 3-183, 1896-1921. Circ. Off. Secr. U.S.D.A. HI 60251
Circular, Ohio Agricultural Experiment Station. Wooster, OH. Nos. 1-156, 1888-1915. Circ. Ohio Agric. Exp. Sta. HI 81790
Circular, Oklahoma Agricultural Experiment Station. Stillwater, OK. Nos. 1-138, 1900-56. Circ. Oklahoma Agric. Exp. Sta. HI 57703
Circular, Oklahoma Agriculture and Mechanical College Extension Service. Stillwater, OK. Nos. 8-314-?, 191?-??-?? Circ. Oklahoma Agric. Mech. Coll. Extens. Serv. Preceded by: Extension bulletin, Oklahoma Agriculture and Mechanical College. Stillwater, OK. HI 82464
Circular, Ontario Department of Agriculture (and Food). Guelph, Ont. Nos. 1-57, 1916-40? Circ. Ontario Dept. Agric. Superseded by: Extension circular, Ontario Department of Agriculture and Food [not entered]. HI 79597
Circular, Oregon Agricultural Experiment Station. Corvallis, OR. Nos. 1, 4, 10, 19, 21-22, 1891-1911-1?. Circ. Oregon Agric. Exp. Sta. Superseded by: Station circular, Oregon Agricultural Experiment Station. Corvallis, OR. HI 57752
Circolare, Osservatore per le Malattie delle Piante. Sez. entomologia. Pisa. 1958+. Circ. Osserv. Malatt. Piante, Sez. Entomol. HI 64212
Circolare Osservatorio Regionale de Fitopatologia per la Calabria. Catanzaro. Vol. 1+, 1947+. Circ. Osserv. Regionale Fitopatol. Calabria. HI 53414
Circular, Pennsylvania Agricultural Experiment Station. State College, PA. No. 1+, 1916+. Circ. Pennsylvania Agric. Exp. Sta. HI 57867
Circular, Pennsylvania Department of Plant Industry. Harrisburg, PA. Nos. 1-114, 1927-30. Circ. Pennsylvania Dept. Pl. Industr. HI 80701
Circular, Puerto Rico Agricultural Experiment Station. Mayagüez, PR. Nos. 1-24, 1903-?? Circ. Puerto Rico Agric. Exp. Sta. Superseded by: Circular, Puerto Rico Federal Experiment Station. Mayagüez, PR. HI 58058
Circular, Puerto Rico Federal Experiment Station. Mayagüez, PR. Nos. 25-35, ?-1952. Circ. Puerto Rico Fed. Exp. Sta. Preceded by: Circular, Puerto Rico Agricultural Experiment Station. Mayagüez, PR. HI 82438
Circular, Puerto Rico Insular Experiment Station. Río Piedras, PR. Nos. 1-90-102-108, 1912-??-??-?? Circ. Puerto Rico Insular Exp. Sta. HI 82428
Circular, Royal Botanic Gardens, Ceylon. Colombo. Vol. 1(1-25), 1897-1901. Circ. Roy. Bot. Gard. Ceylon. Superseded by: Circular and agricultural journal of the Royal Botanic Gardens, Peradeniya. HI 64247
Circular, School of Forestry and Conservation, University of Michigan. Ann Arbor, MI. Nos. 1-6, 1937-42. Circ. School Forest. Conservation Univ. Michigan. HI 64253
Circular, School of Forestry, Oregon State College. Corvallis, OR. No. 1, 1949. Circ. School Forest. Oregon State Coll. HI 64248
Circular, Section of Seed and Plant Introduction, United States Department of Agriculture. Washington, DC. Nos. ?+, 19?? Circ. Sect. Seed Pl. Introd. U.S.D.A. HI 74099
Circular, South Carolina Agricultural Experiment Station. Columbia, SC. No. 1-650+, 1910-92+ [some numbers published in revised editions]. Circ. South Carolina Agric. Exp. Sta. HI 53431
Circular, South Dakota Agricultural Experiment Station. Brookings, SD. No. 1-227?, 1931-79? [no. 155 not published]. Circ. South Dakota Agric. Exp. Sta. HI 59496
Circulaire de la Station Botanique. Brignoles. No. 1+, 1929+. Circ. Stat. Bot. ULS 1-771-3. HI 53415
Circular, State Board of Agriculture, Illinois. Springfield, IL. Nos. 1-257, 18??-1917. Circ. State Board Agric. Illinois. Superseded by: Circular, Department of Agriculture, Illinois. Springfield, IL. HI 80702
Circular, State Forestry Department, Kentucky. Frankfort, KY. No. 1+, 1926+. Circ. State Forest. Dept. Kentucky. HI 80703
Circular technica, Centro Nacional de Pesquisa de Gado de Corte. Campo Grande. No. 1+, 1980+. Circ. Techn. Centro Nac. Pesquisa Gado de Corte. HI 64251
Circular técnica, Centro de Pesquisa Agropecuária do Trópica Semi-Arido. Petrolina. No. 1+, 1980+. Circ. Técn. Centro Pesquisa Agropecu. Tróp. Semi-Arido. HI 64249
