The Journal of the Linnean Society. Botany.

v.46(1922-1924)

Rhodora

v.26 (1924)

North American flora.

v. 10, pt. 4 (1924)

Natural history.

v.4, c. 2

Natural history.

v.3

Natural history.

v.5, c. 2

Freshwater sponges, hydroids & Polyzoa. By N. Annandale.

Freshwater Sponges, Hydroids & Polyzoa

... Rhabdocoelida, bearbeitet von L. von Graff ... Mit 394 abbildungen.

35

Memoirs of the Wistar Institute of Anatomy and Biology.

no. 6, Rev. ed. ((1924)

Turbellaria ... bearb. von Ludwig von Graff ...

23

The Biological bulletin.

v. 46 (1924)

Natural history.

v. 6, c. 2