Commerce reports. Supplement to Commerce reports, no. 10a, 23a, 32a, 42a, 56c, 76a. [Included in price of Commerce reports for subscribers.]. 32a. Mexico: Chihuahua, by James B. Stewart; [Ciudad Juarez, by Edward A. Dow; Nogales, by Charles W. Doherty; Piedras Negras, by William P. Blocker; San Luis Potosi, by Cornelius Ferris, jr.].