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A faunal investigation of western Rainy River District, Ontario
Birds of the Sangre de Cristo Mountains : a checklist : Caminio Real and Questa ranger districts, Carson National Forest
Fruit trees
Soil conditions and plant growth
A study of Compsilura concinnata, an imported tachinid parasite of the gipsy moth and the brown-tail moth
Typification of Schlechter's Costa Rican Orchidaceae, types collected by A. Brenes I
Special contract offer order sheet : season of 1949 : wholesale vine seed growers
Pests not known to occur in the United States or of limited distribution. 86. A tortricid moth
Pests not known to occur in the United States or of limited distribution. 72. Garden weevil
Early Cambrian stratigraphy in the North American Cordillera, with discussion of Albertella and related faunas