Is: 436(Part I/Section 1) - 1964; Methods For Sampling Of Coal And Coke Part 1 Sampling Of Coal Sect
Indian Standards Institution
Is: 436(Part I/Section 1) - 1964; Methods For Sampling Of Coal And Coke Part 1 Sampling Of Coal Sect - BIS 1981
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Is: 436(Part I/Section 1) - 1964; Methods For Sampling Of Coal And Coke Part 1 Sampling Of Coal Sect - BIS 1981
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