Speaking in Many Tonguesby Wilga M. RiversBirckbichler · Die Unterrichtspraxis/Teaching German1986PDF456 KB
Viral and Rickettsial Infections of Manby Thomas M. RiversTobie · The Quarterly Review of Biology1949PDF139 KB
Communicating Naturally in a Second Languageby Wilga M. RiversJoiner · Modern Language Journal1985PDF401 KB