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Animal industry in the British Empire : a brief review of the significance, methods, problems, and potentialities of the live-stock and dairying industries of the British Commonwealth

Animal industry in the British Empire : a brief review of the significance, methods, problems, and potentialities of the live-stock and dairying industries of the British Commonwealth
紙図書
by N.A. Duckham ; with a foreword by J.B. OrrOxford University Press1932
全国の図書館
  • 著者標目Duckham, A. N. Orr, J. B.

.The composition of pastures

.The composition of pastures
紙図書
by J.B. OrrH.M.S.O.1929
全国の図書館
  • 著者標目Orr, J. B.

Minerals in pastures & their relation to animal nutrition

Minerals in pastures & their relation to animal nutrition
紙図書
by J.B. OrrH. K. Lewis1929
全国の図書館

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