ID:DA15726881
Collingwood, George Harris
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by G. H. Collingwood and Warren D. Brush
American Forestry Association 1951 New and rev. ed.
Available at 1 libraries
by H. P. Rusk, G. Harris Collingwood
U.S. Government Printing office [1949] Task force report on ... Appendix M
by G.H. Collingwood and Warren D. Brush
American Forestry c1947
Available at 2 libraries