535.1 SPI\T SPIEGEL, Murray R.        Theory and problems of theoretical mechanics / Spiegel, Murray R.; adapted for si units by Y. Proykova . – SI(metric) edition.. – New Delhi : Mc Grawhill book, 1982.        368p. : ill. . – (Schaum's outline series )        includes index.        ISBN 0-07-084357-0 :        1. Mechanics        1. Engineering I. Proykova, Y