00369nam a2200157Ia 45000010006000000050017000060080041000230410008000640820015000721000028000872450043001152600009001583000028001676500008001956540008002031591720260306170231.0260306t1998||||xx |||||||||||||| ||und|| aESP a620.8bL52 aLetayf Acar, JorgeeAUT 0aSeguridad, higiene y control ambiental c1998 a388 páginas :c23 cm. aGEN aCII