Drake, N. F. (1897). A Geological Reconnaissance of the Coal Fields of the Indian Territory. Zenodo.
Citazione stile Chigago Style (17a edizione)Drake, Noah Fields. A Geological Reconnaissance of the Coal Fields of the Indian Territory. Zenodo, 1897.
Citatione MLA (9a ed.)Drake, Noah Fields. A Geological Reconnaissance of the Coal Fields of the Indian Territory. Zenodo, 1897.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.