1. Plymouth Meeting;National Prescription Audit,1973
2. Plymouth Meeting;National Disease and Therapeutic Index,1991
3. Prescribed use of cholesterol-lowering drugs in the United States, 1978 through 1988;Wysowski;JAMA,1990
4. Fecundity and infertility in the United States, 1965–88. Advance data from vital and health statistics; no 192;Mosher,1990