PORSILD, A.E «The Alpine Flora of the East Slope of Mackenzie Mountains, Northwest Territories» Ottawa, Department of Mines and Resources, Mines and Geology Branch, 1945. 35 p. (25 cm). Illustrated with photographs and a map. Nice copy. National Museum of Canada Bulletin No. 101 (Biological Series No. 30). (Inv. #20335) 20 $
(POTATO) «Bacterial Ring Rot. A Serious Menace to the Potato Industry» Ottawa, Canada Department of Agriculture, 1956. (51 X 34 cm). Large poster in color; kept folded but clean. (Inv. #2145) 20 $
(POTATOES) «Canadian Certified Seed Potatoes» Ottawa, Department of Trade and Commerce, Foreign Trade Service, (1953). 16 p. (22 cm). Original wraps in color. Profusely illustrated. (Inv. #2847) 15 $
POTVIN, Albert «Panorama des forêts du Canada» Ottawa, Ministère de l'Environnement, Service canadien des forêts, 1975. 254 p. (31 cm). Jaquette illustrée et reliure d'édition. Fortement illustré en couleurs. (Inv. #16975) 20 $
POTZGER, John E. & COURTEMANCHE, Albert «A Series of Bogs across Quebec from the St. Lawrence Valley to James Bay» Montréal, Service de Biogéographie, Université de Montréal, 1956. pp. 473-500. (25 cm). Bulletin du Service de Biogéographie #15. Maps, illustrations and tables. (Inv. #821) 15 $
POTZGER, John E. & COURTEMANCHE, Albert «Permafrost and Some Characteristics of Bogs and Vegetation of Northern Quebec» Montréal, Service de Biogéographie, Université de Montréal, 1955. pp. 111-114. (25 cm). Bulletin du Service de Biogéographie #14. Illustrations. (Inv. #17195) 15 $
POTZGER, John E. & COURTEMANCHE, Albert «Pollen Study in the Gatineau Valley, Quebec» Montréal, Service de Biogéographie, Université de Montréal, 1957. pp. 11-23. (25 cm). Bulletin du Service de Biogéographie #17. Tables, maps and illustrated. (Inv. #17503) 15 $
POUGH, Richard H «Audubon Western Bird Guide, Land, Water, and Game Birds: Western North America, including Alaska, from Mexico to Bering Strait and the Arctic Ocean» Garden City NY, Doubleday & Company Inc., 1957. XXXVI,316 p. (18,5 cm). Original decorated cloth. Profusely illustrated comprising color plates. Very good copy. (Inv. #2024) 20 $
POULIN, Leroy «Cours d'Agriculture pour Cercles de Jeunes Agriculteurs» (Québec), Ministère de l'Agriculture, 1935. 96 p. (23 cm). Illustré. (Inv. #26784) 20 $
POULIN, Louis-Philippe «L'Écoulement des produits agricoles» Montréal, les Éditions de l'U.C.C., (1951). 149 p. (21 cm). Vingt-cinquième Cours à Domicile de l'Union Catholique des Cultivateurs, année 1950-51. (Inv. #8743) 15 $