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                 MEIJER CH, 1933, BUR STAND J RES, V10, P381
              
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                 MICHELS A, 1934, IND ENG CHEM, V6, P135
              
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                 MICHELS A, 1933, PHILOS T, V231, P416
              
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                 Michels A., 1935, P ROY SOC          A, V153, P201
              
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                 OSTWALD W, 1933, KOLLOID Z, V64, P50
              
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                 WINKLER CA, 1933, CAN J RES, V9, P613
              

