The Zygnemataceae : (fresh-water conjugate algae) with keys for the identification of genera and species and seven hundred eighty-nine illustrations
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書誌事項
The Zygnemataceae : (fresh-water conjugate algae) with keys for the identification of genera and species and seven hundred eighty-nine illustrations
（Graduate School monographs, . Contributions in botany ; no. 1）
Ohio State University Press, 1951