a royal society discussion held on 1 and 2 November 1979 Royal Society (London) creator text xx London Royal Society 1980 9999 monographic und 186p. Organnized by D A J Tyrrell, WIlliam Henderson and Katherine Elliot-First published in Proceedings of the Royal society of London, series B, Volume 209 (no. 1174), pages 1-186 Rural conditions; Rural health; Public welfare 301.35 R888M 0-85403-148-0 NITIL 190328