Electronic Code of Federal Regulations:
... PART 225—COST PRINCIPLES FOR STATE, LOCAL, AND INDIAN TRIBAL GOVERNMENTS (OMB CIRCULAR A–87) ... for Educational Institutions (OMB Circular A–21), and (2) ...
http://ecfr.gpoaccess.gov/cgi/t/text/text-idx?c=ecfr&sid=1947702fc668c4d17a2c8b25b428d119&rgn=div9&view=text&node=2:1.1.2.3.6.0.15.12.5&idno=2