00294nam a2200133Ia 4500020001800000082000800018100005800026245001600084250000600100260002500106300000800131500000900139650001200148  a81-7450-639-X  a574  aNational Council Of Educational Research And Training 0aBiology XII  a-  aNew DelhibN C E R T  a290  a1277  aBiology