00472nam a2200121   4500008004100000040005500041245013700096260005300233300001000286650002400296942001300320999001700333230705b        |||||||| |||| 00| 0 eng d  aNational Science LibrarycNational Science Library  aInformation sciences: bInformation processing systems and techniquesc/ Defense Documentation Center Alexander, Virginia March 1972  aSpringfield: bUS Department of Commerce, c1972  a223p.  aInformation science  2udccREF  c49727d49727