'BCS70 and NCDS Follow-ups 2004' Comprises- - 1970 British Cohort Study survey specification and invitation to tender, draft 1, 11 December 2002 - 1970 British Cohort Study and National Child Development study survey specification and invitation to tender, draft 3, 20 December 2002 - 1970 British Cohort Study and National Child Development study survey specification and invitation to tender, final version - Supplementary information document, 24 January 2003 - copies of proposals submitted by NOP and the National Centre for Social Research, 2003 - post-tender clarification and assessment documents comparing submissions from NOP and NatCen - copy of the resulting research sub-contract between IOE and Nat Cen - associated correspondence 2002-2004