Freeman Bibliographical Database
| Identifier: | F1399 |
| Date: | 1967 |
| Concise reference: | Darwin, C. R. 1967. Darwin on humus and the earthworm. The formation of vegetable mould etc. New York: Humanities Press. |
| Detailed reference: | 1399. 1967 New York, Humanities Press. U.S.A. edition of No.1398. |