This catalogue of 3,650 sources of scientific and technical information was intended primarily as a reference guide for science and engineering librarians. The majority of the citedtitles date from 1970-1976, with few published before 1966 and none after 1976. The entries are grouped by type of material (bibliographies/dictionaries/tables; atlases and maps/direc tories/yearbooks; treatises and monographs; abstracts/indices; databases; etc.). Subject fields include general science, math, physics, metallurgy, materials science, and engineering. (Editor's note: Useful as a general reference guide for conservators in researching materials problems.) -- AATA