Turner, Ralph L. (1973). A comparative dictionary of the Indo-aryan languages. 2. impr. London: Oxford U.P.
A Sanskrit-English Dictionary: Etymologically and Philologically Arranged with Special Reference to Cognate Indo-European languages, Monier Monier-Williams, revised by E. Leumann, C. Cappeller, et al. 1899, Clarendon Press, Oxford
Robert Farren, PIE culture words collection, 2017
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This map shows the etymological links in a geographic context.