Abstract: This bibliography represents a part of the materials in the 4hprk collection through December, 1989. 4hprk is a taxonomy of professional research and knowledge for 4-H and youth development professionals. It was developed as part of USDA funded research conducted at Ohio State and Mississippi State Universities. The set of bibliographies is composed of five categories: communication, educational design, youth development, youth program management, and volunteerism. A bibliography has been created for each category. The bibliographies provide a bibliographic citation and an abstract for each item in the collection.