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File contains 1 autograph letter signed. Includes correspondence with Robert Ridgway.

File contains 2 autograph letters signed. Includes correspondence with Longinos Navás S J.

File contains 1 signed receipt, 6 autograph letters signed, 2 typed letters signed, 3 typed letters (unsigned). Includes correspondence with Max Dunbar, Casey A Wood.

File contains 1 autograph letter signed (Bowdler Sharpe Coll.).

File contains 2 autograph letters signed. Includes correspondence with Rupert Jones.

File contains 2 autograph letters signed. Includes correspondence with Rupert Jones.

File contains 1 autograph letter signed. Includes correspondence with R A Farley.

File contains "The I.C.U.N. Meeting in Canada in September 1972: A personal account and a critique".

File contains "Natural History and Reproduction in Diplocardia mississippiensis (Oligochaeta)" (Contributions to North American Earthworms (Annelida), No. 1, 1972), "Observations on the Hatchlings of Eisenia foetida and Bismastos tumidus (Oligochaeta: Lumbricidae)" (Contributions to North American Earthworms (Annelida), No. 11, 1972).