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 /business/person/company Juilliard School
William Schuman /business/person/company Juilliard School
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Robert Mann
PERSON
Juilliard School
ORGANIZATION
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William Schuman
PERSON
Juilliard School
ORGANIZATION
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