APA (7th ed.) Citation

(1993). Vol. 91, № 2; OiL and Gas journal. 1993.

Chicago Style (17th ed.) Citation

Vol. 91, № 2; OiL and Gas Journal. 1993, 1993.

MLA (9th ed.) Citation

Vol. 91, № 2; OiL and Gas Journal. 1993, 1993.

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