The fourth annual research inventory describes 728 Mexican-related research projects being conducted in 1984 or to begin in 1985 in 14 countries. Data come from questionnaires sent during 1984 to more than 1,800 individual researchers and 650 institutions around the world. Each project description provides names and addresses of principal and co-principal investigators, project title and abstract, date begun and estimated completion date, funding sources, and project-generated publications. Research project descriptions are organized under 10 general subject headings: Mexican studies, Mexico and the world, border studies, Chicano studies, agricultural and forestry sciences, biological sciences, environmental studies, health studies, marine sciences, and physical sciences. Coverage of projects dealing with Mexican history, border studies, marine sciences, and Mexican international economic and political relations has been expanded in the present volume. New sections have been added on communication, economics, political economy, environmental studies, and forestry studies. Distribution by academic disciplines of research projects reported in the Inventory is represented in chart form. A subject index, index of researchers, index of organizations and institutions, and list of abbreviations and acronyms are provided. (LFL)