1825|Buchon, J. A. C.; Carey, H. C.; Lea, I.1:1 090 000
Vermont.
1856|Colton, G.W.1:850 000
Vermont.
1838|Bradford, Thomas G.1:792 000
Vermont.
1869|Beers, Frederick W.1:760 320
The Geology of New Hampshire. A report comprising the results of explorations ordered by the Legislature, [by] C. H. Hitchcock, State Geologist, J. H. Huntington, Principal Assistant