00457nam a2200133Ia 450000500170000000800410001704100080005808200150006611000100008124500700009126000310016130000160019265001150020820191114145717.0190710s9999    xx            000 0 und d  aeng  a574 N231 B  aNCERT 0aBiology b: text book for higher secondary schools class xi - xii  aNew Delhib: NCERT, c1986  axiv, 303p.   aBiology - Textbook for schools a| Animal - Anatomy a| Plants - Anatomy - Physiology a| Man and environment