Sinkholes in Pennsylvania
By: by William E. Kochanov
Series: Educational series -- 11; Educational series (Pennsylvania. Bureau of Topographic and Geologic Survey) -- no. 11
Publisher: Pennsylvania Geological Survey
Published: 1999
Place of publication: Harrisburg
Language: eng
Number of pages: 33
Subjects: Sinkholes -- Pennsylvania -- Popular works; Subsidences (Earth movements) -- Pennsylvania -- Popular works
Genres: Popular works
Notes: "Fourth series."

Includes bibliographical references (p. 29)

Available also on the internet