Primary Information Source(s):

   County Business Patterns, 1988 and 1989 on CD-ROM [machine-
   readable data file] / prepared by the Bureau of the Census.
   Washington:  The Bureau [producer and distributor], 1992.
   The technical documentation should be cited as follows:

   County Business Patterns, 1988 and 1989 on CD-ROM / prepared
   by Data Access and Use Staff, Data User Services Division,
   Bureau of the Census.     Washington:  The Bureau, 1992.