Hard, M. E. (1961). mashroom: Edible and otherwise its habitat and its time of growth. Hafner Publishing.
Chicago-tyylinen lähdeviittausHard, M. E. Mashroom: Edible and Otherwise Its Habitat and Its Time of Growth. New York: Hafner Publishing, 1961.
MLA-viiteHard, M. E. Mashroom: Edible and Otherwise Its Habitat and Its Time of Growth. Hafner Publishing, 1961.
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