University of California Press, Berkeley & Los Angeles, 1950. Gold boards with red spine. Black titles on front and spine. Boards are bright and clean. Contents tight. Top corner of front e/p has been cut off. Some tape staining to rear e/p else a clean volume. xiv + 141pp. There is a slight musty smell. DW has been price clipped. There is some tape remnants on the flaps and a white tape edging to the wrapper. DW has faded spine. Originally published in 1943, this copy is the 5th printing of the second edition.