The Biological bulletin.

v. 22 (1911-1912)

Handwörterbuch der naturwissenschaften /

4

Handwörterbuch der naturwissenschaften /

5

Carnegie Institution of Washington publication.

no. 175, v. 1 (1912)

Carnegie Institution of Washington publication.

no. 153 (1912)

Carnegie Institution of Washington publication.

no. 166 (1912)

Handwörterbuch der naturwissenschaften /

3

Handwörterbuch der naturwissenschaften /

8

Handwörterbuch der naturwissenschaften /

1

Carnegie Institution of Washington publication.

no. 174 (1912)

Handwörterbuch der naturwissenschaften /

2

Carnegie Institution of Washington publication.

no. 164 (1912)

Carnegie Institution of Washington publication.

no. 176 (1912)

The Ottawa naturalist.

v. 25 (1911-1912)