Sprague, H. B. (1959). Grasslands. American Association for the Advancement of Science.
Cita Chicago Style (17a ed.)Sprague, Howard B. Grasslands. Washington: American Association for the Advancement of Science, 1959.
Cita MLA (8a ed.)Sprague, Howard B. Grasslands. American Association for the Advancement of Science, 1959.
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