^"Lowell Holly". The Trustees of Reservations. Retrieved July 3, 2021.
^Burk, John S. (2021). Massachusetts trail guide : AMC's comprehensive guide to hiking trails in Massachusetts, from the Berkshires to Cape Cod (11th ed.). Boston, Massachusetts. p. 415. ISBN978-1-62842-130-9.{{cite book}}: CS1 maint: location missing publisher (link)