Thirteen programmes covering the principal fields of geophysical research.
New techniques are refining the measurement of the earth and its wobbly and irregular movement.
Produced by the National Academy of Sciences, U.S.A.
(to 11.00)
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Thirteen programmes covering the principal fields of geophysical research.
New techniques are refining the measurement of the earth and its wobbly and irregular movement.
Produced by the National Academy of Sciences, U.S.A.
(to 11.00)