Indian snakes : an elementary treatise on ophiology with a descriptive catalogue of the snakes found in India and the adjoining countries / by Edward Nicholson Nicholson, Edward. creator text book Madras Higginbotham 1874 1874 2nd ed.
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ENG China India Snakes South Asia QL666.O6 N53 Museum of Comparative Zoology--Biodiversity Heritage Library digitization project https://www.biodiversitylibrary.org/bibliography/5496 32569460 10.5962/bhl.title.5496 EUW