120years.net
Studio 317, one of four composition studios at the C-PEMC, circa 1970. Clockwise from the center front, Vladimir Ussachevsky (seated), Milton Babbitt, Bülent Arel, Pril Smiley, Mario Davidovsky, Alice Shields, Otto Luening.
Babbit, Luening, Ussachevsky and others at the RCA MkII