Citazione APA

Special publication. (1980). Proceedings of symposium on drilling technology and engineering aids to geoogical exploration calcutta 12th to 15th february 1980: Special publication No.4. Geological Survey of India.

Stile di citazione Chicago

Special publication. Proceedings of Symposium on Drilling Technology and Engineering Aids to Geoogical Exploration Calcutta 12th to 15th February 1980: Special Publication No.4. Newdelhi: Geological Survey of India, 1980.

Citazione MLA

Special publication. Proceedings of Symposium on Drilling Technology and Engineering Aids to Geoogical Exploration Calcutta 12th to 15th February 1980: Special Publication No.4. Geological Survey of India, 1980.