1.

図書
図書
1. Farm machinery and farm motors
by J. Brownlee Davidson and Leon Wilson Chase
出版情報: New York : Orange Judd , London : Kegan Paul, Trench, Trubner, 1908
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2.

図書
図書
2. Agricultural engineering : a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader
by J. Brownlee Davidson
出版情報: St. Paul, Minn. : Webb, c1913
シリーズ名: Farm science series
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3.

図書
図書
3. Agricultural engineering : a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Rev. ed
by J. Brownlee Davidson
出版情報: St. Paul, Minn. : Webb, 1919
シリーズ名: Farm science series
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