Surficial geology of the Ayer quadrangle, Massachusetts [cartographic material]
- Author:
- Jahns, Richard H. (Richard Henry), 1915-1983
- Publisher:
- U.S. Geological Survey
- Subject:
- Geology
- Spatial Coverage:
- Massachusetts, Middlesex County, and Worcester County
- Language:
- English
- Year:
- 1953
- Date Issued:
- 2011-11-29T19:01:09Z
- Date Modified:
- 2012-03-05T17:16:33Z
- Library Catalog Record:
- https://search.library.yale.edu/catalog/10125072
- Digital Collections Record:
- No Digital Collections record
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