Text ( visual ) : unmediated Energy : its production, conversion and use in the service of man / by Philip Sporn. -- New York : Macmillan , 1963. -- xiv, 69 p. ; 20 cm. -- (A Pergamon Press book). -- (BB1082998X) ; https://ci.nii.ac.jp/ncid/BB1082998X Author Heading(s): Sporn, Philip

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