Marshall, R. B. (1911). Results of spirit leveling in the State of Washington 1896 to 1910, incl: Work done in cooperation with the state during 1909 and 1910. Gov. Print. Off.
Chicago-Zitierstil (17. Ausg.)Marshall, Robert Bradford. Results of Spirit Leveling in the State of Washington 1896 to 1910, Incl: Work Done in Cooperation with the State During 1909 and 1910. Washington, DC: Gov. Print. Off, 1911.
MLA-Zitierstil (9. Ausg.)Marshall, Robert Bradford. Results of Spirit Leveling in the State of Washington 1896 to 1910, Incl: Work Done in Cooperation with the State During 1909 and 1910. Gov. Print. Off, 1911.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.