Abstract : Purpose: The article investigates the customers for the document supply of print serials. Approach: The study is based on data from INIST-CNRS for document supply requests in pharmacology. Data were collected from 1998 to 2005 (10,000+ customer accounts with 4.6m orders). Findings: The article provides information about the distribution of orders per customer type, about the geographical origin of customers, about the ordering trends among pharmaceutical customers and of pharmaceutical journals. Originality: This is the last of three articles on a longitudinal study over 13 years on different aspects of the relationship between document supply and impact factor (citations) in pharmacology, a scientific domain with a high use of scientific information.