Não informado. (1952). Forestry Research Notes. University of Wisconsin, College of Agricultural and Life Sciences, Extension Forestry Office.
Citação do estilo Chicago (17ª ed.)Não informado. Forestry Research Notes. Madison, Wis: University of Wisconsin, College of Agricultural and Life Sciences, Extension Forestry Office, 1952.
Citação MLA (8ª ed.)Não informado. Forestry Research Notes. University of Wisconsin, College of Agricultural and Life Sciences, Extension Forestry Office, 1952.
Atenció: Aquestes cites poden no estar 100% correctes.