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DJVU PDF Matisoff, J.A. 1989, "The bulging monosyllable, or the mora the merrier: echo-vowel adverbialization in Lahu", in South-east Asian Linguisitics: Essays in Honour of Eugénie J.A. Henderson, ed. J.H.C.S. Davidson, pp. 163-198. School of Oriental and African Studies, University of London. cite.

DJVU PDF Rabel-Heymann, L. 1976, "Sound Symbolism and Khasi Adverbs", in South-east Asian Linguistic Studies Vol. 2, ed. N.D. Liem, vol. 2, pp. 253-262. Pacific Linguistics, the Australian National University. cite.

DJVU PDF Schulze, M. 1987, "Intense action adverbials in Sunwar: a verbal intensifier system", in Linguistics of the Tibeto-Burman Area, vol. 10, no. 1, pp. 63-85. cite.

DJVU PDF Suriya Ratanakul. 2001, "Adverbs in Sgaw Karen", in The Mon-Khmer Studies Journal, vol. 31, pp. 127-134. cite.