- Correspondence - 2 letters; 1869, 1940
- Biographical Information [notes from reference sources]
- "An Old Time Mining Excitement with a California Parallel" by Hanks; n.d.
- Third Annual Report of the State Mineralogist for the Year Ending June 1, 1883 [Hanks was Cal. State Mineralogist]; 1883
- "A History and Description of Magnesia and Its Base and Compounds with Particular Reference to Magnesite..." by Hanks; 1895
- "Colemanite: Type Locality and Describer" by H. Earl Pemberton [cites Hanks]; 1973