Tornado occurrences in the United States
By: compiled by Laura V. Wolford, Climatological Services Division.
Contributors: Wolford, Laura V.
Series: Technical paper -- no. 20; Technical paper (United States. Weather Bureau) -- no. 20.
Publisher: Dept. of Commerce, Weather Bureau : for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1960
Place of publication: Washington, D.C
Language: eng
Number of pages: 71
Subjects: Tornadoes.; Tornadoes -- Statistics.
Genres: Statistics.
Notes: "This revision of the first edition of Technical Paper No. 20 extends the data to include the years 1951 through 1958 and contains additional textual material, tabulations, and charts."