INDIAN STANDARD GUIDE FOR CORE DRILLING OBSERVATIONS. IS : 5313-1980
BUREAU OF INDIAN STA
INDIAN STANDARD GUIDE FOR CORE DRILLING OBSERVATIONS. IS : 5313-1980 - 1st rev. ed. 2004 - NEW DELHI BUREAU OF INDIAN STANDARDS. - 10
CORE DRILLING OBSERVATIONS
624 / BUR
INDIAN STANDARD GUIDE FOR CORE DRILLING OBSERVATIONS. IS : 5313-1980 - 1st rev. ed. 2004 - NEW DELHI BUREAU OF INDIAN STANDARDS. - 10
CORE DRILLING OBSERVATIONS
624 / BUR