I'm working on an analysis of introductory economics textbooks published in the United States between about 1890 and 1950 (the period between Marshall and Samuelson, roughly). I've accumulated an ad hoc collection of texts based on the holdings of my library and scattered references in the secondary literature (Elzinga 1992, Walstad et al 1998, and Giraud 2013 in particular), but I was hoping that there might be some more systematic way to generate a universe of texts from which to sample. Does anyone have a recommendation for a good source that discusses principles texts in this period, perhaps with information on relative influence (number of editions, course adoptions, or sales)? Does such a source exist?

Thanks very much!