Ralph H. Frederick

Five- to 60-minute precipitation frequency for the eastern and central United States

Ralph H. Frederick, Vance A. Myers, Eugene P. Auciello, 1977 .

Precipitation-frequency atlas of the Western United States

R. J. Tracey, Ralph H. Frederick, John F. Miller, 1973 .

National Oceanic and Atmospheric Administration National Weather Service

Ralph H. Frederick, R. H. Frederick, 1973 .