Research recommendations of the second Conference on Problems of the Deaf and Hard of Hearing, Washington, D.C., February 1 and 2, 1929.

Manylion Llyfryddiaeth
Awduron Corfforaethol:	Conference on Problems of the Deaf and Hard of Hearing Washington, D.C., National Research Council (U.S.). Division of Anthropology and Psychology, National Research Council (U.S.)
Fformat:	Licensed eBooks
Iaith:	Saesneg
Cyhoeddwyd:	Washington, D.C. : Division of Anthropology and Psychology of the National Research Council, 1929.
Cyfres:	Reprint and circular series of the National Research Council ; 88.
Mynediad Ar-lein:	https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&AN=123951

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