Mean percentage of possible sunshine, monthly and annual /
United States.Weather Bureau.
Washington, D.C. : The Bureau : for sale by the Supt. of Docs., U.S. Govt. Print. Off.,
1960.
Statistics based on information from 164 stations with 20 years or more of records through 1959.
Printed on both sides of sheet.
Includes table.
Bartholomew firm library.
Sunshine