00297nam a2200121Ia 450000500170000000800410001704100080005808200150006610000190008124500330010026000330013330000090016620260720174655.0260720s1991    xx            000 0 und d  aeng  a500.7 KIST  aKishore, Lalit  aTeaching of physical science  aNew DelhibDoaba Housec1991  a295p