00365nam a2200121Ia 4500008004100000040001700041082002100058100002000079245004100099260003200140300001000172650006100182190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta503bB186S  aBalkrishna (Ed) 0aSugam vigyan vishwakoshc Balkrishna  aDelhibRavindra Pressc1990  a106p.  aScience; Encyclopedias and dictionaries; Reference books