Meddelanden af Societas pro Fauna et Flora Fennica.

Haft. 44 (1917-1918)

The Ohio journal of science.

v. 18 (1917-1918)

Zeitschrift für Gärungsphysiologie.

6, 1917-1918

Bulletin of the Museum of Comparative Zoology at Harvard College.

v.61 (1917-1918)