00000cam a22000004a 4500 UP-99796217608823660 Buklod 20090512083547.0 a r |||| u| ta 090512s1977 xx d r |||| u| (iLib)UPD-00086997319 DLC DCSI Eng QA 533 D745 1922 Drooyan, Irving. Essentials of trigonometry [by] Irving Drooyan, Walter Hadel and Charles C. Carico. New York Macmillan [c1977] ix, 336 p. illus. (part col.) 24 cm. "A portion of this material has been adapted from Trigonometry: an analytical approach, by Irving Drooyan and Walter Hadel." Plane trigonometry. Hadel, Walter joint author. Carico, Charles C. joint author. FO UPD DSCI QA 533 D745 1922 Book