Winthrop, R. C. 1. (1850). Admission of California: Speech of Hon. R.C. Winthrop, of Mass., on the President's message, transmitting the constitution of California: delivered in committee of the whole in the House of representatives of the United States, May 8, 1850. Washington: Gideon & Co., Printers.

Winthrop, Robert C. 1809-1894. Admission of California: Speech of Hon. R.C. Winthrop, of Mass., On the President's Message, Transmitting the Constitution of California: Delivered in Committee of the Whole in the House of Representatives of the United States, May 8, 1850. Washington: Gideon & Co., Printers, 1850.

Winthrop, Robert C. 1809-1894. Admission of California: Speech of Hon. R.C. Winthrop, of Mass., On the President's Message, Transmitting the Constitution of California: Delivered in Committee of the Whole in the House of Representatives of the United States, May 8, 1850. Washington: Gideon & Co., Printers, 1850.