J3-H-144 (Report: SECRE UNCLASSIFIED Joint Task Force Seven, Lu. ar I. Corp. Auth. New K.exico 1. Hardtack OPERATION HARDTACh. ENE. as . CONCEPT NO. 1457, Task i2ets 7.1, June l, 1957. 44p. 5-3 -65 N3 Y.OT J-3-1-099 (Ret: SRD) Joint Tack Poree Seven. Los Alamos, Tew Mexicc. OPERATION HARDIACK. TASK GROUP 7.1. OPERATION PIAN WO. 1-58. 1958, 16. Cd: UNCLASSIFIED Task Group 7.1, I. 1. Corp. Auth. Hardtack January 15, 5-16-69 3 Rec'd: Cones: Fotte List: LA-2164 (Report: SECRET) Card: CONFIDENTIAL DI Los Alamos Scientific Lab. SOME PHENOMENAIN HIGH-ALTITUDE EXPLOSIONS. Hans A. Bethe. Nov. 7, 1957. 35p. 1. Air Bursts-Yield 2. Hardtack_ I. N. Smee Personal Author Corp. Author N5 293