Porter, Duncan M. |
On the road to the Origin with Darwin, Hooker, and Gray / Duncan M. Porter |
In: Journal of the history of biology Vol. 26 (1993), p. 1-38 |
Darwin, Charles, 1809-1882 |
The portable Darwin / edited with an introduction, notes and epilogue by Duncan M. Porter and Peter W. Graham |
New York : Penguin books, 1993. |
Porter, Duncan M. |
With Humboldt, Wallace and Spruce at San Carlos de Rio Negro / Duncan M. Porter |
In: Richard Spruce (1817-1893). p. 51-63 |