Moller, Herbert (1985). "Voice Change in Human Biological Development". Journal of Interdisciplinary History. 16 (2). The MIT Press: 239–253. doi:10.2307/204176. JSTOR204176. PMID11617364.
Moller, Herbert (1985). "Voice Change in Human Biological Development". Journal of Interdisciplinary History. 16 (2). The MIT Press: 239–253. doi:10.2307/204176. JSTOR204176. PMID11617364.
Moller, Herbert (1985). "Voice Change in Human Biological Development". Journal of Interdisciplinary History. 16 (2). The MIT Press: 239–253. doi:10.2307/204176. JSTOR204176. PMID11617364.