The Industrial College of the Armed Forces was established to prepare selected officers of the Armed Forces, both Regular and Reserve, and civilian executives for important managerial positions in time of emergency. Instruction is provided in three forms: (1) resident, (2) correspondence, and (3) traveling lecture teams. The base for all three types of instruction is the same. Experience attests to the great value of the correspondence course. The subject matter is presented in small volumes for convenience, each volume representing a major division of the subject. They are reorganized and revised from time to time to bring them up to date and to place emphasis as change may dictate upon those phases of the course deemed most important. Considerable background and illustrative materials are included as a basis for broad and comprehensive education in the field of world resources and their use in support of national objectives. The texts consist of materials written by members of the faculty of the Industrial College, of selected lectures delivered at the College, and of selections from various publications. The texts in use were prepared mainly by the Correspondence Text Committee of the Education Division of the College. Current revisions of these texts are prepared by the Branches of the Education Division and coordinated by the Committee, which consists of Dr. Benjamin H. Williams, Chairman, Dr. Harold J. Clem, Dr. Louis C. Hunter, Dr. Andrew J. Kress, and Dr. Samuel H. McGuire. Suggestions and recommendations are based on the instructional policy of the Correspondence Study Branch as well as on student reactions to text materials. The Industrial College owes a debt of gratitude to a number of lecturers, writers, and publishers who have permitted the use of their materials in this series of texts. Specific acknowledgments are made in each volume for these contributions.