| Citation | Darwin, C.R., 1977. Early notebook, containing observations made at Edinburgh, March 1827. p. 285-291. In P.H. Barrett (ed.) The collected papers of Charles Darwin. Vol.2. University of Chicago Press, Chicago. |
| DOI | http://dx.doi.org/ |
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| Ref. No. | 8965 |
| Language | English |
| Usage | used in part |
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