Mr. Koff , along with the violinist Robert Mann , the violist Raphael Hillyer and the cellist Arthur Winograd , formed the Juilliard String Quartet in 1946 , at the request of the composer William Schuman , who was president of the Juilliard School .
Robert Mann
Juilliard School
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William Schuman
Juilliard School
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PERSON
Robert Mann
PERSON
William Schuman
ORGANIZATION
Juilliard School