Gerald A. Mulligan

1928

• Biology of Canadian Weeds
• Common and botanical names of weeds of Canada
• Common weeds of Canada. Gerald A. Mulligan
• L' herbe à la puce, le sumac à vernis et le Rhus diversiloba
• Les plantes nuisibles communes du Canada
• Poison-ivy, western poison oak, poison sumac
• The Biology of Canadian weeds
• Common and botanical names of weeds in Canada
• Common weeds of Canada
• Common weeds of Canada, field guide
• Key to the Brassicaceae (Cruciferae) of Canada and Alaska
• Natural interspecific hybridization between sexual and apogamous species of the beech fern genus Phegopteris Fée