Snyder, Llewellyn R. Essential business mathematics / by Llewellyn R. Snyder ; F. G. Nichols consulting editor. - 1st ed. [second impression]. - New York ; London : McGraw-Hill Book Co., 1947. - XII, 434 s. : il. ; 23 cm. Indeks. Subjects--Topical Terms: Matematyka finansowa.