Barbara L. Herwaldt

Waterborne Disease: 1993 and 1994 (PDF)

Gunther F. Craun, Michael H. Kramer, Barbara L. Herwaldt, 1996 .

Waterborne disease in the United States, 1991 and 1992

Barbara L. Herwaldt, Rebecca L. Calderon, Dennis D. Juranek, 1994 .