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By "Ruhmann, Max H. "
Diseases and pests of cultivated plants
By: Eastham, J. W. - Hoy, B. - Ruhmann, Max H. - British Columbia.
Publication info: Victoria, B.C. :W.H. Cullin,1916.
Contributed by: Canadiana.org (archive.org)
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)