A guide to the poisonous plants and weed seeds of Canada and the northern United States
By: by R. B. Thomson and H. B. Sifton
Contributors: Sifton, Harold Boyd, joint author
Publisher: University of Toronto Press
Published: 1922
Place of publication: [Toronto]
Language: eng
Number of pages: 169
Subjects: Poisonous plants; Botany -- Canada.; Botany -- United States.