Drifting Continents and Colliding Paradigms"The book provides an excellent historical summary of the debates over continental drift theory in this century." Contemporary Sociology "This is a useful discussion of the way that science works. The book will be of value to philosophers of science . . . " Choice " . . . will find an important place in university and department libraries, and will interest afficionados of the factual and intellectual history of the earth sciences." Terra Nova " . . .