Letter from Cass Canfield, President, Planned Parenthood Federation of America, New York to Howard Walter Florey He and Julian Huxley have been discussing the world population problem - feels views of scientists and other intellectual leaders have little impact on public policy - says they have drafted enclosed statement which has been sent to outstanding individuals - believes release of statement later in year will help to further sound population policies - invites Florey to sign statement. 6 October 1960