Irwin, P. (1909). The Tropical savanna. Jacaranda Pr.
Tohutoru Kātū Chicago (17th ed.)Irwin, P.G. The Tropical Savanna. Milton: Jacaranda Pr, 1909.
Tohutoro MLA (9th ed.)Irwin, P.G. The Tropical Savanna. Jacaranda Pr, 1909.
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