Al-Hajji, A. A., & unknown. (1990). Nickel and vanadyl porphyrins in Arabian heavy crude oil.
Chicago Style (17th ed.) CitationAl-Hajji, Adnan Ahmed, and unknown. Nickel and Vanadyl Porphyrins in Arabian Heavy Crude Oil. 1990.
MLA (9th ed.) CitationAl-Hajji, Adnan Ahmed, and unknown. Nickel and Vanadyl Porphyrins in Arabian Heavy Crude Oil. 1990.
Warning: These citations may not always be 100% accurate.