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harold cotton
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Aquaria and garden ponds
W. Harold Cotton · A. & C. Black, ltd.
89 sayfa · 1935
Aquariums / Aquatic plants / Fishes / Water gardens
Principles and practice of field experimentation
John Wishart, Harold George Sanders, Empire Cotton Growing Corporation · Empire cotton growing corporation
100 sayfa · 1935
Agriculture / Experimentation / Statistics
Agricultural processing pamphlets
George P. Bodnar, John Herron Cox, Harold E. Earp, W. M. Hurst, R. C. Miller, E. A. Back, R. T. Cotton, H. D. Young, Dorothy Nickerson, Willis B. Combs, W. P. Carroll, , · Yayınevi bilinmiyor