00310nam a2200133 a 450000500170000008200170001710000230003411000240005724500200008125000120010126000300011330000150014371000180015820251203091554.0  a500,bD, win  aWindridge, Charles  aKenway, Patrick, J.  aGeneral science  a4th ed.  aDelhibPustak Mahalc1989  a4v, 22 cm.  aDavies, Barry