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	1.	No cover image available Ordovician cauldron subsidence of the Blue Hills Complex, eastern Massachusetts by Billings, Marland Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 93(9), 1982, p. 909-920: : ill., carte, tab., rés.(Angl) Availability: No items available.
	2.	No cover image available The "Piermont Allochthon" in the Littleton-Mosilauke area of west-central New Hampshire : alternative interpretation and reply by Billings, Marland Moench, Robert Material type: Article; Format: print Language: Eng In: Geological Society of America bulletin 104(11), 1992, p. 1539-1545: : carte, tab., rés.(Angl) Availability: No items available.

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