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By "Joy, Benjamin, 1888-"
Diseases and pests of cultivated plants. By J.W. Eastham ... and Max H. Ruhmann ... with article on Sprays and spraying by B. Hoy ...
By: Eastham, John William, - Joy, Benjamin, - Ruhmann, Max H.
Publication info: Victoria, B.C.,Printed by W.H. Cullen, printer to the King's most excellent Majesty,1916.
Contributed by: University of California Libraries (archive.org)