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2720-1977, . (1978). METHODS OF TEST FOR SOILS PART - XXXIX DIRECT SHEAR TEST FOR SOILS CONTAINING GRAVEL. DELHI: ISI.
2720-1977, . 1978. METHODS OF TEST FOR SOILS PART - XXXIX DIRECT SHEAR TEST FOR SOILS CONTAINING GRAVEL. DELHI: ISI.
2720-1977, . METHODS OF TEST FOR SOILS PART - XXXIX DIRECT SHEAR TEST FOR SOILS CONTAINING GRAVEL. DELHI: ISI. 1978.