The following classified, descriptive list of titles is intended to provide reference librarians with a current checklist of new reference books, and is designed to supplement the RSR review column, “Recent Reference Books,” by Frances Neel Cheney. “Reference Books in Print” includes all additional books received prior to the inclusion deadline established for this issue. Appearance in this column does not preclude a later review in RSR. Publishers are urged to send a copy of all new reference books directly to RSR as soon as published, for immediate listing in “Reference Books in Print.” The prevailing policy of including all reference books received has temporarily allowed the listing of titles with imprints older than two years; with increased receipt of more current titles from a longer list of publishers, this policy will soon be discontinued (with the exception of older books newly acquired for distribution by another publisher). An additional copy of any title specifically requested by Mrs. Cheney should be sent to her for review. A decision to review titles appearing in the present column will then be made by Mrs. Cheney at her own discretion.