UCRL-5344 weni> (Report: SECRET) Card: UNCLASSIFIED Calif, Univ., Livermore. Radiation Lab. WEAPON DEVELOPMENT DURING AUGUST, 1958, NO. 50, 1958, JUN September 16, 1. 2. I. Hardtack-Phase II Hardtack Corp, Author 39p. rd N4 N6 UCRL-5510 (Report: SECRET) card: UNCLASSIFIED Calif. Univ., Livermore. Lawrence Radiation Lab. EXTERNAL NEUTRON MEAS'REMENTS, OPERATION HARDTACK - PHASE I. Francis C. Gilbert and Stanley C. Freden. March 6, 1959. 39p. ~~, ae ° l. 2. I. Il. Hardtack Neutron Measure ments Authors (2) Corp. Author N6 202