Supplementing an earlier work, this bibliography lists all new publications on diffusion of innovations (75 new nonempirical and 184 coded empirical studies) added to the Diffusion Documents Center, Michigan State University, from July 1967 to September 1968. Psychology, anthropology, agricultural economics, general economics, communication, extension education, public education, journalism, market research, industrial engineering, medical sociology, and rural sociology are among the research traditions represented in these entries. Also included are statistics, arranged by discipline, covering empirical diffusion research publications in both the present and the earlier bibliography. (ly)