BOOKQUE

Crop Acreage, Yields and Production in South Dakota, 1926-1960: (by Economic Areas and Counties)
Ray Fremont Pengra , Rex David Helfinstine
· 1961
Using Climatic Water Balance to Determine Irrigation Needs in South Dakota
Ray Fremont Pengra
· 1961
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Average Weekly Temperatures, Precipitation and New Snow Received at 60 Weather Bureau Stations Through 1954
Ray Fremont Pengra
· 1956
Precipitation as a Basis for Estimating Crop Yields in Central South Dakota
Ray Fremont Pengra
· 1946
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Genealogies: Morse, Mason, Lyon, Pengra
Ray F. Pengra , Mary Markham
· 1959
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Agricultural Drought in South Dakota: How Many Drought Days Per Season?
Ray F. Pengra
· 1958
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Weather in the Making
Ray Fremont Pengra
· 1957
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Farm Land Market Trends in South Dakota, 1941-1952
Ray Fremont Pengra , Gabriel Lundy
· 1953
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Frequencies of Daily Occurrence of Maximum and Minimum Temperatures at Pierre, South Dakota Each Week of the Year by Five Degree Intervals Together with Highest and Lowest Temperature Recorded and Standard Deviation of Temperatures Each Week of the Year
Ray Fremont Pengra
· 1957
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Weekly Summary of Climatological Data, Huron, South Dakota, 1881-1953
Ray Fremont Pengra
· 1955