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Stabilization of the complexes of barium, strontium and calcium the polyterephtaloyl - oxalamidrazone and of the poly - diphenyl ether dicarboxylic - - - 4,4 '- oxalamidrazone
Stabilization of the complexes of barium, strontium and calcium the polyterephtaloyl - oxalamidrazone and of the poly - diphenyl ether dicarboxylic - - - 4,4 '- oxalamidrazone