UK DATA ARCHIVE DOCUMENTATION 2852 - National Travel Survey, 1972-1973 Conversion of data and documentation formats -------------------------------------------- In June 2003 a series of SPSS setup files were created using the FILE TYPE NESTED FILE command in order to produce SPSS portable files at different levels. These files can be merged using the appropriate identifiers. Data and documentation notes ------------------------------- Please note that there is a slight discrepancy between the printed frequency figures within the documentation and those produced via the data file. Notes from data delivery and post-order corrections ---------------------------------------------------