TY - MANSCPT DB - Science History Institute DP - Science History Institute M2 - Courtesy of Science History Institute. Rights: Public Domain Mark 1.0 TI - First Day Cover commemorating United Nations efforts for the cessation of nuclear testing and preservation of humanity ID - z029p480m AU - Fleetwood CY - United States DA - 1964/// YR - 1964 AV - Witco Stamp Collection, Box 4 VL - Witco Stamp Collection, Box 4 AN - Witco Stamp Collection, Box 4 UR - https://digital.sciencehistory.org/works/z029p480m AB - Cachet and stamp depict a mushroom cloud from a nuclear weapons test. Cachet was created by Fleetwood and the stamp was commissioned by the United Nations Postal Administration. Postmark depicts the United Nations building. KW - Postage stamps KW - Nuclear weapons--Testing KW - Postmarks KW - Commemorative postage stamps KW - United Nations KW - Science on postage stamps KW - Nuclear nonproliferation KW - Cachets (Philately) KW - First day covers (Philately) LA - French, Russian, Spanish, English ER -