Institutions often have a need for maintaining "institutional bibliographies," a list of all papers published by individuals affiliated with the institution. Using the Observatoire de Paris (France) as an example, we show how this can be done, using the services of the ADS and other bibliographic databases. In this specific case, we are able to quantify the success rate in creating the extensive list of the scientific output of the institution by each source database. Our analysis helps identify the current limitations and ambiguities in the contents and format of the affiliation/address field, as produced by the authors and modified by journal editors and database managers. We advocate for the development of an authoritative list of astronomical institutions that can be used by the ADS and publishers as a controlled field in order to significantly improve the efficiency of affiliation queries.