Ripley, S. D. A Synopsis of the Birds of India and Pakistan: Together with those of Nepal , Sikkim, Bhutan and Ceylon.
Tohutoru Kātū Chicago (17th ed.)Ripley, Sidney Dillon. A Synopsis of the Birds of India and Pakistan: Together with Those of Nepal , Sikkim, Bhutan and Ceylon.
Tohutoro MLA (9th ed.)Ripley, Sidney Dillon. A Synopsis of the Birds of India and Pakistan: Together with Those of Nepal , Sikkim, Bhutan and Ceylon.
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