Kentucky. State Geologist & Orton, E. F. B. (1891). Report on the occurrence of petroleum, natural gas and asphalt rock in western Kentucky: Based on examinations made in 1888 and 1889. E. P. Johnson.
Chicago Style (17th ed.) CitationKentucky. State Geologist and Edward Francis Baxter Orton. Report on the Occurrence of Petroleum, Natural Gas and Asphalt Rock in Western Kentucky: Based on Examinations Made in 1888 and 1889. Frankfort, Ky.: E. P. Johnson, 1891.
MLA (9th ed.) CitationKentucky. State Geologist and Edward Francis Baxter Orton. Report on the Occurrence of Petroleum, Natural Gas and Asphalt Rock in Western Kentucky: Based on Examinations Made in 1888 and 1889. E. P. Johnson, 1891.
Warning: These citations may not always be 100% accurate.