TY - BOOK TI - Rust research in Canada and related plant-disease investigations UR - https://www.biodiversitylibrary.org/item/121279 PB - Research Branch, Canada Dept. of Agriculture CY - Ottawa PY - 1961 N1 - "April 1961." AU - Johnson, Thorvaldur. AU - Canada. Department of Agriculture. KW - Canada KW - Rust fungi ER -