Guide to the Poisonous Plants and Weed Seeds of Canada and the Northern United StatesRobert Boyd Thomson, Harold Boyd Sifton · First published 1922Open the Tome
A sketch of the past fifty years of Canadian botanyRobert Boyd Thomson · First published 1932Open the Tome
Report of the opening of the botanical laboratories, University of TorontoRobert Boyd Thomson · First published 1932Open the Tome
Resin canals in the Canadian spruce (Picea canadensis (Mill.) B.S.P.)Robert Boyd Thomson, Harold Boyd Sifton · First published 1925Open the Tome
On the comparative anatomy and affinities of the AraucarineaeRobert Boyd Thomson · First published 1913Open the Tome
Do the Abietineae extend to the carboniferous?Robert Boyd Thomson, Arthur Everett Allin · First published 1912Open the Tome
