2720-1972, . (1984). METHODS OF TEST FOR SOILS PART XXXIV DETERMINATION OF DENSITY OF SOIL IN PLACE BY RIBBER BALLOON METHODS. DELHI: ISI.
2720-1972, . 1984. METHODS OF TEST FOR SOILS PART XXXIV DETERMINATION OF DENSITY OF SOIL IN PLACE BY RIBBER BALLOON METHODS. DELHI: ISI.
2720-1972, . METHODS OF TEST FOR SOILS PART XXXIV DETERMINATION OF DENSITY OF SOIL IN PLACE BY RIBBER BALLOON METHODS. DELHI: ISI. 1984.