“…The present bibliography generally covers the latter, that is, secondary sources about the history ofbehaviorism, not primary sources from that history, even though at enough temporal distance the latter can inform historical analysis (see, e.g., Catania, 1968;Catania & Harnad, 1988). To have included materials from the history of behavior analysis, though, would have meant including a great deal of the field's earlier scholarship, from its first texts (e.g., Watson, 1903Watson, , 1914Watson, , 1919 to later descriptions of the discipline's practices, such as its teaching curricula (e.g., Frick, Keller, & Schoenfeld, 1947;Keller & Schoenfeld, 1949) and its every expansion into new areas (e.g., "applied animal psychology," see Breland & Breland, 1951). What were tertiary and secondary sources in their own time may now have value as primary sources, but these distinctions were not ones we made.…”