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percy w evans
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Cilt sonuçları
Film Strips of the U.S. Department of Agriculture
Fred Campbell Meier, Furman Lloyd Mulford, Milton Stover Eisenhower, Walter Penn Taylor, Wilbur Reed Mattoon, Arthur Percy Chew · Yayınevi bilinmiyor
842 sayfa · 1930
Agricultural experiment stations
Training Teachers of Agriculture
American Association for the Advancement of Agricultural Teaching. Meeting, Fred Clayton Butler, Frederick William Reynolds, Harry Percy Barrows, Henry Harold Goldberger, J. H. Berkowitz, National Council of Primary Education (U.S.). Meeting, United States. Bureau of Education, , · Yayınevi bilinmiyor
Handbuch Der Regionalen Geologie
Arthur William Rogers, Arthur Lewis Hall, Percy Albert Wagner · Yayınevi bilinmiyor
250 sayfa · 1929
Geology