5×7 inches: Biography of a Source, Source for Prosopography. The Permanent Recorder Cards of Rockefeller-Endowed Organizations 1914-1970. Episode 3.

At what stage were permanent recorder cards created (and stopped to be)? There is not much about the organizational cogs that presided to the wax and wane of permanent recorder cards. The other records of the different Rockefeller-endowed organizations, including the digitized versions of officers' diaries, are silent on the topic. And, certainly, the subject does not sound so exciting. Yet, we had to understand this history in order to appraise the major original source for our database. We...