00293nam a22001097a 4500008004100000020001500041082001200056100002000068245002000088260006500108300001000173101228t        xxu||||| |||| 00| 0 eng d  a0201100789  a302.224  aYorkey, Richard  aReply requested  aCalifornia:bAddison-Wesley Publishing Company, Inc.,c1981.  a127p.