Graham, S. A. (1937). The walking stick as a forest defoliator. University of Michigan press.
Lua i Stíl Chicago (17ú heag.)Graham, Samuel Alexander. The Walking Stick as a Forest Defoliator. Ann Arbor: University of Michigan press, 1937.
Lua MLA (8ú heag.)Graham, Samuel Alexander. The Walking Stick as a Forest Defoliator. University of Michigan press, 1937.
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