During the first year of publication of Current Papers in Physics (1966) a joint study was undertaken in the UK by Aslib working under contract with the Institute of Electrical Engineers (IEE) and in the US by the American Institute of Physics (AIP) to assess the need for the new publication and its usefulness to the physics community. The study was designed in three phases. This report covered the third phase which was conducted after nine months of publication of CPP. 215 physicists in the UK and 393 physicists in the US returned a copy of the October 10, 1966 issue of Current Papers in Physics on which they had indicated items of interest to them. These markings and any additional comments offered by the respondents were analyzed in terms of the physicists' specialties to provide detailed information on the optimum arrangement of CPP to match the fields of interest of the physics community. In addition, the methods in which CPP is used, and the number of requests for abstracts and papers of references in this issue of the publication were recorded. (Author)