Não informado. (1953). Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science.
Chicago-referens (17:e uppl.)Não informado. Netherlands Journal of Agricultural Science. Wageningen, Holanda: Royal Netherlands Society for Agricultural Science, 1953.
MLA-referens (8:e uppl.)Não informado. Netherlands Journal of Agricultural Science. Royal Netherlands Society for Agricultural Science, 1953.
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