Books by Oscar L. Boulanger:
Books in the extended shelves:
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Boulanger, Oscar L., 1888-: Report of the Royal commission on price spreads. (J. O. Patenaude, printer to the King, 1937), also by Canada. Royal commission on price spreads, Henry Herbert Stevens, Edward James Young, J. L. Ilsley, Samuel Factor, and William Walker Kennedy (page images at HathiTrust)
Find more by Oscar L. Boulanger at your library, or elsewhere.