Dept. of Agriculture. (1970). Contours of change. [Washington: For sale by the Supt. of Docs..
Style de citation ChicagoDept. of Agriculture. Contours of Change. [Washington: For sale by the Supt. of Docs., 1970.
Style de citation MLADept. of Agriculture. Contours of Change. [Washington: For sale by the Supt. of Docs., 1970.
Attention : ces citations peuvent ne pas être correctes à 100%.