Christensen, S. K. (1953). A comparative study of the milk control programs of the northeastern states.
Citace podle Chicago (17th ed.)Christensen, Seymour Kent. A Comparative Study of the Milk Control Programs of the Northeastern States. [Ithaca, N.Y.], 1953.
Citace podle MLA (8th ed.)Christensen, Seymour Kent. A Comparative Study of the Milk Control Programs of the Northeastern States. 1953.
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