000 00255nam a2200097Ia 4500
008 200511s9999||||xx |||||||||||||| ||und||
082 _aE-503
245 0 _aEncyclopaedia of science and technology. Vol.4.
260 _bMcGraw Hill Pub.
_c1971
300 _a719p.
999 _c67505
_d67505
650 _aEncyclopedias
_aScience Encyclopedias
_aTechnology Encyclopedias
650 _aScience