OFFICIAL USE ONLY WT~954 OPERATION CASTLE-—-PROJECT 2.7a Report to the Scientific Directoy RADIOACTIVITY OF OPEN-SEA PLANKTON SAMPLES T.R. Fol2zom F.D. Jennirgs M.W. Johnson University of California Scripps Institution of Oceanography LaJolla, Cailfornia QUALIFIED RECLITVINS MR CT ~~ Dw A FROM Oley a) 3-4 OFFICIAL USE ONLY