New York: Golden Press, 1990. Quarto, colour photographs, a fine copy in dustwrapper. Penny Olsen is the editorial advisor, a prestigious position. More

London: Academic Press, 2003. Quarto, illustrations, maps, fine copy in laminated boards.. The speciation and biogeography of birds provides a fresh insight into species formation in birds and of the factors that influence their geographical distributions. The book describes how bird species are formed and how they are defined and..... More