Practical business statistics / Frederick E. Croxton, Dudley J. Cowden [and] Ben W. Bolch. Croxton, Frederick E. (Frederick Emory), 1899- Bolch, Ben W., 1938-, joint author. Cowden, Dudley J. (Dudley Johnstone), 1899-, joint author. Statistics. 311 CRP Bibliographical footnotes. Englewood Cliffs : Prentice-Hall, 1969. 1969. 1969 Text xvi, 444 p. : eng