Mason et al., 1993, AJ, 106, 637

1) Separated mail header, table description, and table data.

2) Second epoch of observation in Table 3 joined to previous record to reduce
   extraneous blanks.

3) Generated TABLE3.DOC, standardizing table description.

4) Generated ABSTRACT.DOC, title and abstract from the paper.

----- For AAS CD-ROM Volume IV -----

1) Converted TABLE3.DOC to CDS-style TABLE.DOC.