Excerpt from Principles of Geology, Vol. 3 of 4: Being an Inquiry How Far the Former Changes of the Earth"s Surface Are Referable to Causes Now in Operation
Phenomena of hybrids - Hunter"s opinions - Mules not strictly intermediate between parent Это и многое другое вы найдете в книге Principles of Geology, Vol. 3 of 4 (Charles Lyell)