Long, H. P. (1925). Alden-Snell-Long ancestry: Being the compiler's line of descent from John Alden who arrived at Plymouth, Massachusetts, on the Mayflower, in 1620 / prepared by Hallock P. Long for submission to the Mayflower Society at Washington, D.C., March 1, 1925. [Washington? D.C.: Long.

Long, Hallock Porter. Alden-Snell-Long Ancestry: Being the Compiler's Line of Descent From John Alden Who Arrived At Plymouth, Massachusetts, On the Mayflower, in 1620 / Prepared By Hallock P. Long for Submission to the Mayflower Society At Washington, D.C., March 1, 1925. [Washington? D.C.: Long, 1925.

Long, Hallock Porter. Alden-Snell-Long Ancestry: Being the Compiler's Line of Descent From John Alden Who Arrived At Plymouth, Massachusetts, On the Mayflower, in 1620 / Prepared By Hallock P. Long for Submission to the Mayflower Society At Washington, D.C., March 1, 1925. [Washington? D.C.: Long, 1925.