Diseases and pests of cultivated plants Eastham, John William, 1879- creator Ruhmann, Max H. contributor Joy, Benjamin, 1888- contributor text book Victoria, B.C Printed by W.H. Cullen, printer to the King's most excellent Majesty 1916 1916
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ENG Insect pests Plant diseases Spraying Bulletin (British Columbia. Dept. of Agriculture), no. 68 https://www.biodiversitylibrary.org/bibliography/26406 28597742 10.5962/bhl.title.26406 Library, U.S. Dept. of Agriculture