The Contra Costa Community College District (CCCCD), in California, conducted a study to determine the type and number of transfer students served by both the CCCCD and by the University of California (UC), the California State University (CSU), or St. Mary's College (SMC) between 1982-83 and 1989-90. The study also assessed the completeness and fairness of CCCCD transfer data contained in reports by the California Postsecondary Education Commission (CPEC). Highlighted findings included the following: (1) during the period examined, 36,576 students were served by both the CCCCD and one of the four-year institutions; (2) of the total, 58.4% (n=21,354) were "traditional" transfer students, i.e., those who first enrolled in the CCCCD and then continued their education at UC (20.4%), CSU (74.8%), or SMC (4.9%); (3) 14% (n=5,120) were "concurrent" transfer students, i.e., those who were enrolled in one of the four-year institutions and within the CCCCD at the same time; (4) 12.9% (n=4,709) were "reverse" transfers, i.e., those who had been enrolled at one of the four-year institutions, and then enrolled within the CCCCD, while 10.8% (n=3,954) were "returning" transfers, those who were enrolled within the CCCCD, transferred to one of the four-year schools, and then transferred back to the CCCCD; (5) the number of minority transfers to UC increased by 120.6%, and to CSU by 55.7%; and (6) the criteria and accounting procedures used by CPEC seriously underestimated the number of students the district helped to make transfer-eligible or assisted in transferring to four-year institutions. The report contains narrative summaries and extensive data tables for the CCCCD and its member colleges (Contra Costa, Diablo Valley, and Los Medanos), UC, CSU, and SMC. (MAB)