Introduction to statistical method Sylvain Ehrenfeld and Sebastian B. Littauer. Ehrenfeld, Sylvain. Littauer, Sebastian B., joint author. Mathematical statistics. Decision making Mathematical models. Experimental design. QA276 .E35 519.9 EHI New York : McGraw-Hill, c1964. c1964. 1964 Text x, 533 p. : eng McGraw-Hill series in probability and statistics