The results of the efforts of the National Federation of Science Abstracting and Indexing Services (NFSAIS) Bibliographic Citation Committee (BCC) Working Group on Data Element Definition are reported. The report contains a recommended uniform approach to the handling of bibliographic data elements. The approach is an amalgam of current practices reported by the NFSAIS Member Services represented in the BCC. The recommended list of elements was distilled from the various contents of manual and machine bibliographic records reported. For the sake of simplicity, the universe of inquiry was limited in at least three ways. The elements were restricted to those used to describe a small set of bibliographic items. The items which appeared as published prices were assumed to be identical to the items referred to by a logical record in a computer. In addition, the theoretical possibilities suggested by placing the data elements as well as their interrelations and groupings into computer-based environments were not explored. The report is in two parts: part one is a matrix which identifies the data elements for seven types of publications, part two lists definitions for the elements. (Author/NH)