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Continue to ChatIS-2720-(PART 34)-1972- INDIAN STANDARD METHODS OF TEST FOR SOILS DETERMINATION OF DENSITY OF SOIL IN-PLACE BY RUBBER-BALLOON METHOD https://civilengineer.co.in/indian-standard-codes/is-2720-part-34-1972-indian-standard-methods-of-test-for-soils-determination-of-density-of-soil-in-place-by-rubber-balloon-method/