| Helfer, J.W., 1859. Dr. Johann Wilhelm Helfer's gedruckte und ungedruckte Schriften uber die Tenasserim Provinzen, den Mergui Archipel und die Andamanen-Inseln. Mitttheilungen der Kaiserlich-Koniglichen Geographischen Gesellschaft zu Wien 3 (3): 260-275
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| Helfer, J.W., 1839. The provinces of Ye, Tavoy and Mergue on the Tenasserim Coast: Visited and examined by order of Government, with the view to develop their natural resources. Calcutta, G.H. Huttmann
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| Helfer, J.W., 1838. Notes on the animal productions of the Tenasserim Provinces. Journal of the Asiatic Society of Bengal 7 (2): 855-863
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