na INLIS000000000006887 Ind 0010-1118006887 519.2 519..2COCe William G. Cochran; Gertrude M. Cox Experimental designs COCHRAN, William G. 2nd ed. New York John Wiley Sons 1957 611 p.; 25 cm 611 p.; 25 cm STATISTICAL METHODS 2nd ed. 1051/69