It is recommended this item be cited as: Blake, William P. 1890. Uintaite, Albertite, Grahamite and Asphaltum Described and Compared, with Observations on Bitumen and Its Compounds. Transaction of the American Institutes of Mining Engineers XVIII, 1890, p. 563-583. Available online in the Petroleum History Library at https://www.museoenergiaripi.it/?p=3531&preview=true