Knowles, F., Watkin, J. A practical course in agricultural chemistry. London: MacMillan & Co etc., 1960 XI, 216 p. : ill.
Knowles, F., Watkin, J. A practical course in agricultural chemistry. London: MacMillan & Co etc., 1960 XI, 216 p. : ill.
Knowles, F., Watkin, J. (1960) A practical course in agricultural chemistry, London: MacMillan & Co etc. XI, 216 p. : ill.
Knowles, F., & Watkin, J. (1960). A practical course in agricultural chemistry. For senior students of agriculture, dairying and poultry husbandry. London: MacMillan & Co etc., XI, 216 p. : ill.
Knowles F, Watkin J. A practical course in agricultural chemistry: For senior students of agriculture, dairying and poultry husbandry. London: MacMillan & Co etc.; 1960. p. XI, 216 p. : ill.
