This
                work presents data on locomotives from small builders
                (other than Alco, Baldwin,
                Fairbanks-Morse, and Lima) that constructed
                locomotives for use in Mexico. A few
                common-carrier locomotives are listed, however
                the vast majority are those built for 
                industrial operations throughout Mexico, from the
                haciendas of Yucatán to the mines of Sonora. 
                All data on American
                builders were taken directly from the respective
                builders' lists. Other data were gathered
                independently. A word of caution: These lists are 
                not error-free. Errors can occur in gauges,
                models, and spellings of names and places.
                This should be seen as information upon which
                to build; not as the ultimate reference. 
                Although
                books have been published on Mexican industrial
                and shortline railroads, no book data have been
                integrated into these lists. The primary reason
                is that such volumes focus on steam locomotives
                and generally ignore the internal combustion
                types. Another reason is that there are errors
                in both the builders' lists and the books; so,
                rather than compound inaccuracies, the builders'
                data are presented here as a starting point for
                an information base. 
                Unless
                metric units are specified, gauges are
                denominated in inches. "Std" refers to standard gauge, which equals
                56.5 inches (1,435 mm). 
                Some of
                the listings show no specific destination because
                some builders recorded their export sales this
                way. They apparently used sales agents or
                dealers, and these maintained the final records
                as to actual buyers. Another shortcoming is that
                export sales data do not always reflect resales. 
                
                Each of the links below leads to the table of data for
                the corresponding builder. 
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