Bibliographies on the MTR ETR, G. E. Materials Testing Reactor, Vallecitos Boiling Water Reactor, and Westinghouse Testing Reactor are presented. In addition, bibliographies of miscellaneous reactors and inpile loops are included. Sources used are Engineering Index, 1951 to 1958, Industrial Arts Indes. 1951 to July 1959, and Nuclear Science Abstracts, 1948 to August 15, 1959. (J.R.D.)