The purpose of this study was: (1) to replicate earlier studies on vocational maturity by Super and Crites, neither of which included Mexican-Americans in their samplings; (2) to restrict the study to Mexican-American populations in both urban and rural areas of California; (3) to make intra-state comparisons of findings; (4) to compare results obtained with those of the original studies and; (5) to establish a type of normative data for students of Mexican extraction. A population of ninth grade boys of Mexican descent was used. A review of the literature in areas related to the study is presented and organized into categories which include occupational choice, vocational maturity and self concept. This report provides sociological data on the communities and schools used in the study. Although the document reports in part findings on such items as the vocational maturity interview and the Vocational Development Inventory final conclusions depend on the outcome of the study toward which all initial work has been directed. An extensive bibliography and appendix is included. (Author/EW)