Speck, F. G. 1. (1927). The Nanticoke and Conoy Indians: With a review of linguistic material from manuscript and living sources : an historical study. Wilmington: Historical Society of Delaware.

Speck, Frank G. 1881-1950. The Nanticoke and Conoy Indians: With a Review of Linguistic Material From Manuscript and Living Sources : An Historical Study. Wilmington: Historical Society of Delaware, 1927.

Speck, Frank G. 1881-1950. The Nanticoke and Conoy Indians: With a Review of Linguistic Material From Manuscript and Living Sources : An Historical Study. Wilmington: Historical Society of Delaware, 1927.