Commerce reports. Supplement to Commerce reports, no. 22e-f, 26a, 35a, 37a, 41b, 51a, 53e-f. 35a. Mexico: [Ensenada, by William C. Burdett; Frontera, by Lee R. Blohm; Mexican, by Walter F. Boyle; Progreso, by O. Gaylord Marsh; Saltillo, by Harold Playter; Vera Cruz, by Paul H. Foster].