00326nam a22000977a 4500008004100000040005500041080002700096245004400123260004900167300001200216230626b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aR 608.3(047.1)(73)bK6  aUnited States patent previews 1965-1970  aWashington: bBowker Associates Inc., c1966  a1174p.