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Continue to ChatIS - 2720 (PART 23)-1976 INDIAN STANDARD METHODS OF TEST FOR SOILS DETERMINATION OF CALCIUM CARBONATE .(FIRST REVISION) https://civilengineer.co.in/indian-standard-codes/is-2720-part-23-1976-indian-standard-methods-of-test-for-soils-determination-of-calcium-carbonate-first-revision/