00370nam a2200121Ia 4500008004100000040001700041082002400058110003400082245004900116260003200165300001000197650004100207190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta591.03bB171B  aBal gyan-vigyan encyclopaedia 0aBal gyan-vigyan encyclopaediabJal thal jeev  aNew DelhibPustakayanc1992  a159p.  aScience; Encyclopaedia; Dictionaries