Devastating North Atlantic hurricanes : 1938-1965 / compiled from data provided by Environmental Data Service, Environmental Science Services Administration -- Frequency of tornadoes : 1953-1962 / compiled from data provided by Environmental Data Service, ESSA -- Mean annual number of days with thunderstorms / Adapted from a 1:20,000,000-scale map by Environmental Data Service, ESSA -- Maximum expected winds : 50-year mean recurrence interval / Adapted from a 1:10,000,000-scale map by Environmental Data Service, ESSA, published in ASCE: Journal of the Structural Division, v. 94, no. ST 7, July 1968, p. 1793.
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