General clinical research centers :
a research resources directory.

APA Citation

Research Resources Information Center., National Institutes of Health (U.S.). Division of Research Resources. General clinical research centers: a research resources directory. Bethesda, Md.: Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health, Division of Research Resources, 1978-.

MLA Citation

Research Resources Information Center, and National Institutes of Health (U.S.). Division of Research Resources. General Clinical Research Centers: a Research Resources Directory. Bethesda, Md.: Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health, Division of Research Resources, 1978-,