Sisam, J. (1947). The use of aerial survey in forestry and agriculture (6th.). Imperial forestry bureau and pastures and field crops.
Citace podle Chicago (17th ed.)Sisam, J.W.B. The Use of Aerial Survey in Forestry and Agriculture. 6th. Aberystwyth: Imperial forestry bureau and pastures and field crops, 1947.
Citace podle MLA (9th ed.)Sisam, J.W.B. The Use of Aerial Survey in Forestry and Agriculture. 6th. Imperial forestry bureau and pastures and field crops, 1947.
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