G Ainsworth Harrison to D V Glass, London School of Economics, Houghton Street Says Florey agreed there must be meeting of Population Study Group to consider population growth in developed countries and that proofs of Glass's paper should be circulated to members - is enclosing for comment the memo on 'Deficiencies of natality data', prepared by sub committee of US National Academy of Sciences' Population Committee - comments on this. 5 January 1968