REFERENCES 1. T. D. Hanscome and D. K. Willett; “Neutron Flux Measurements”; Project 2.2, Operation Teapot, WT-1118; Naval Research Laboratory, Washington, D. C.; Secret Restricted Data. 2. P. A. Caldwell and others; “Attenuation of High Frequency and Ultra High Frequency by Ionization Resulting From Nuclear Explosions”; Project 6.6, Operation Redwing, ITR-1346, July 1956; Naval Research Laboratory, Washington, D. C.; Secret Restricted Data. 3. T. D. Hanscome and others; “Parameters Affecting Design of Instrumentation to Measure Gamma and Neutron Fluxes from a Very-High-Altitude Nuclear Detonation”; Project 2.7, Operation Plumbbob, ITR—1416; Naval Research Laboratory, Washington, D. C.; Secret Restricted Data. 4. N. A. Haskell and J. T. Pantall; “Blast Overpressure from Very-High-Altitude Bursts”; Project 1.10, Operation Hardtack, ITR—1615; Air Force Cambridge Research Center, Bedford, Massachusetts; Secret Restricted Data. Lager 37 anct 39 are (leech 36