"cook, a h. "
gravity on the earth: / a.h. cook - 1 ed. - uk : wykeham publications 1969. - "xi, 95p.; 21 cm."
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525. coo
gravity on the earth: / a.h. cook - 1 ed. - uk : wykeham publications 1969. - "xi, 95p.; 21 cm."
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525. coo