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21, L. B. Lockhart, Jr., and R. L. Patterson, Jr., Intercalibration of
the Major North American Networks Employed in Monitoring Air-
borne Fission Products, Report NRL-6025, December 1963. See
also Radiological Health Data, 5(1): 12-15 (1964).
22, L. B. Lockhart, Jr., R. L. Patterson, Jr., and W. L. Anderson,
Characteristics of Air-filter Media Used for Monitoring Airborne
Radioactivity, Report NRL-6054, U. S. Naval Research Laboratory,
March 1964.
23. L. B. Lockhart, Jr., R. L. Patterson, Jr., A. W. Saunders, Jr., and
R. W. Black, Summary Report on Fission-product Radioactivity in
the Air Along the 80th Meridian (West), 1957-1962, Report NRL-
6104, U.S. Naval Research Laboratory, June 1964. See also Rad.
Health Data, (6): 255-265 (1964).
24, R. L. Patterson, Jr., and L. B. Lockhart, Jr., Geographical Distribution of Lead-210 (RaD) in the Ground-level Air,in The Natural
Radiation Environment, J. A, S. Adams and W. M, Lowder
25.
26,
27.
28.
(Eds.),
Chap. 23, pp. 383-392, University of Chicago Press, Chicago, 1964.
L, B. Lockhart, Jr., Behavior of Airborne Fission Products. Am.
Scientist, 5A3): 301-305 (1964).
R, L. Patterson, Jr., L. B. Lockhart, Jr., and W. L. Anderson,
Performance Characteristics of the FPP-15 Filter Material Used
in the U.S.S.R. for Environmental Radioactivity Monitoring, Report
NRL-6165, U. S. Naval Research Laboratory, September 1964.
W.R. Collins, Jr., The 80th Meridian Network, January 1963, Rad.
Health Data, 4(7): 342-346 (1963).
A, Walton and M. W. M. Leo, Studies of Nuclear Debris in Precipitation, USAEC Report NYO-9534, Isotopes, Inc., March 1963,
29. J. Blok and J. F.
Bleichrodt, Summary of Radioactive Fallout
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RVO-TNO Report MBL/1963/13, August 1963.
30. A, Walton and M. W. M. Leo, Studies of Nuclear Debris in Precipitation, USAEC Report NYO-9533, Isotopes, Inc., November 1962.
31. R.S. Cambray, E. M. R. Fisher, G. 8. Spicer, C. G. Wallace, and
T. J. Webber, Radioactive Fallout in Air and Rain-—-Results to the
Middle of 1962, Report AERE-R-4094, United Kingdom Atomic
Energy Authority Research Group, November 1962.