The selected bibliography contains about 400 references taken from a keysort file of more than 45,000 references, compiled from commercially available data bases and published sources, relevant to gerontology. Those of questionable accuracy were checked or deleted during the verification process. Most references are in English and were selected from the years 1959-74. Earlier items or foreign titles were included if they were regarded as significant or contained unique data. In many cases the foreign titles include English abstracts in the originals. Information on the composition of the keysort file and on the availability of the references is given. Items are grouped according to the following topics and subtopics: (1) Intellectual Function, (2) Age Group Differences (General Studies and Theoretical Implications of Intellectual Development), (3) Variables Involved in Individual and Group IQ Differences (Social-Psychological Variables, Biopsychological Variables, and Pharmacological Effects), (4) Pathological States and Intelligence (General Studies and Diagnosis with IQ Tests), and (5) Cognitive Functioning and Intelligence (Cognitive Style, Learning, Memory, and Problem Solving and Creativity). (Author/MS)