I. INVESTIGATION AND RESEARCH IS A FUNDAMENTAL MARXIST METHOD by Shih Tung-hsiang -- II. THE GREAT SIGNIFICANCE OF THE VICTORY OF THE CUBAN PEOPLE'S PATRIOTIC STRUGGLE AGAINST U.S. IMPERIALISM by Yu Chao-li -- III. ANOTHER SURVEY OF THE INTERNAL CONTRADICTIONS OF MACHINE TOOLS AND THE USE OF WOODEN BLOCKS IN THEM by Hou Chen-ping, Li Ming, Kuan Shih-hsu, Lu chi-p'ei -- IV. ASCERTAIN GROUND WATER RESOURCES FOR THE SUPPORT OF AGRICULTURAL PRODUCTION by Ho Ch'ang-kung -- V. ACCELERATE THE PRODUCTION OF CHEMICAL FERTILIZERS AND AGRICULTURAL CHEMICALS by Li Ch'ao-po -- VI. INCREASE THE STOCKPILE OF ORGANIC FERTILIZERS by T'u-feng.
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