found: Work cat.: U.S. Cong. Senate. Comm. on Governmental Affairs. Subcomm. on International Security, Proliferation, and Federal Services. The issuance of semipostal stamps by the U.S. Postal Service, hearing ... 2000:t.p. (semipostal stamps) p. 1 (specially issued postal stamps sold by the U.S. Postal Service; first authorized by Congress in 1997 with the Stamp Out Breast Cancer Act, to help raise funds for breast cancer research)
found: Cong. record, July 17, 2000, accessed Dec. 20, 2000:p. H6068-6071, p. H6068 (Semipostal Authorization Act; H.R. 4437; "semipostal" means a postage stamp which is issued and sold by the Postal Service, at a premium, in order to help provide funding for a cause)
found: U.S. Cong. House. Comm. on Energy and Commerce. To amend Title 39, United States Code ... 2007:t.p. (Postal service to issue a semipostal) p. 2 (known as semipostals ... semipostal stamps)