The purpose of this guide is to offer a complete view of all professional associations within a specific occupational field. Contents pages give a complete listing of the career field titles and page numbers for searching organizations in related fields. Section I organizes information under the headings of career field, name and address, and comments. The career field classification system of the guide follows the "Dictionary of Occupational Titles," Volume II, U. S. Department of Labor. Classifications are limited to the first three digits in the numerical code for more comprehensive coverage. On each right-hand page in this section is a key to abbreviations. Section II, Appendix, includes an alphabetical index to the 2,000 organizations as an aid in searching for specific occupational headings. Also included in the appendix are organizations omitted from the guide, and a 16-item bibliography of supplementary sources of information. (TA)