by Canada. Experimental Farms Service

1930

by Canada. Division of Horticulture

1922

by Canada. Experimental Farms

1927

by Canada. Experimental Farms Service

1926

by Canada. Rust Research Laboratory, Winnipeg

1928

by Engineering Institute of Canada

1924

by Canada. Department of Labour

1923

by Canada. Department of Labour

1921

by Canada. Parliament

1927

by Canada. Research Station, Kentville, N.S.

1922

by Canada. Department of Agriculture. Research Station, Kentville, N. S.

1921

by Canada. Research Station, Fredericton, N.B.

1922