UK Data Archive - Important Study Information SN 1930 Family Resources Survey, 1979 SPSS, Stata and tab-delimited files have been generated from the original study format, which was a SIR database. Users should consult the study documentation for further information on the files generated. Three of the files, CREDAT, ER and PER, have no values, but are useful for the coding frame information. The documentation from the Family Finances Survey, 1978, (FFS) to which this study is a follow-up, have been added to the user guide for information. The FFS is not currently available from the UKDA.