RITTER-VALLI LAW

\ɹˈɪtəvˈali lˈɔː], \ɹˈɪtəvˈali lˈɔː], \ɹ_ˈɪ_t_ə_v_ˈa_l_i l_ˈɔː]\
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1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland