IS CLSASSIFICATION AND IDENTIFICATION OF SOILS FOR GENERAL ENGINEERING PURPOSES
IS 1498 1970
IS CLSASSIFICATION AND IDENTIFICATION OF SOILS FOR GENERAL ENGINEERING PURPOSES - DELHI BUREAU OF INDIAN STANDARD 1972 - 24
IS CLSASSIFICATION AND IDENTIFICATION OF SOILS FOR GENERAL ENGINEERING PURPOSES - DELHI BUREAU OF INDIAN STANDARD 1972 - 24