Resolution – RDC number 626, 09 March 2022; (1 page(s), in Portuguese)
SI 5438 part 12 - Chemicals used for treatment of water intended for human consumption: Calcium carbonate; (7 page(s), in Hebrew), (13 page(s), in English)
Normative Instruction number 128, 30 March 2022; (11 page(s), in Portuguese)
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