Wandering Gypsy has just added two very interesting books for purchase written by Carl L. Johannessen Professor Emeritus, Biogeography, at the University of Oregon.
The first book “World Trade and Biological Exchanges Before 1492” (Revised and Expanded Edition) presents a comprehensive, well-referenced, intriguing overview of historical and archaeological evidence for pre-Columbian exchange of plants, micro-fauna and animals between the Old World and New World Prior to Columbus. The current 2013 edition of the book reflects continued research and discoveries of more than fifty years of research by Professor Carl L. Johannessen Emeritus and his Co-Author John L, Sorenson, Professor Emeritus, Anthropology, in the field of early transoceanic diffusion. The tables of contents have also been reformatted for easier use. Information not available at the time of the original publication has been added to the relevant species. This book, written in a more encyclopedic style, resembles an expanded annotated bibliography and can be a great source for Graduate Student Thesis subjects. `