@article{18394, recid = {18394}, title = {Evaluation of world's important crudes.}, publisher = {Petroleum Pub. Co.,}, address = {Tulsa, Okla. :}, pages = {ii, 77 p. :}, year = {1973}, note = {Cover title: Evaluations of world's important crudes.}, url = {http://library.usi.edu/record/18394}, }