books.google.com - Based on extensive research, Anne Curzan's study makes a major contribution by providing historical perspective on controversial questions regarding the continuing evolution of gender definition. How and why did grammatical gender gradually disappear from English and get replaced by a system where the...http://books.google.com/books/about/Gender_Shifts_in_the_History_of_English.html?id=qQ20vvzacXMC&utm_source=gb-gplus-shareGender Shifts in the History of English