Diatom Analysis and the Acidification of Lakes: Discussion Thrush, B. A. ; Battarbee, R. W. ; Clymo, R. S. ; Le Cren, E. D. ; Goldsmith, P. ; Mellanby, K. ; Bradshaw, A. D. ; Chester, P. F. ; Howells, Gwyneth D. ; Kerr, A. Abstract Publication: Philosophical Transactions of the Royal Society of London Series B Pub Date: May 1984 Bibcode: 1984RSPTB.305..474T