Winthrop, R. C. 1. (1886). Memoir of the Hon. David Sears: Prepared agreeably to a resolution of the Massachusetts Historical Society. Cambridge: John Wilson and Son, University Press.

Winthrop, Robert C. 1834-1905. Memoir of the Hon. David Sears: Prepared Agreeably to a Resolution of the Massachusetts Historical Society. Cambridge: John Wilson and Son, University Press, 1886.

Winthrop, Robert C. 1834-1905. Memoir of the Hon. David Sears: Prepared Agreeably to a Resolution of the Massachusetts Historical Society. Cambridge: John Wilson and Son, University Press, 1886.