Found 2 collections related to Operetta -- Production and direction

Historical Records Survey (U.S.)
Billy Rose Theatre Division | MWEZ 2147
1 volume (49 leaves), 28 cm; 1 volume (49 leaves), 28 cm
Typescript list compiled by James D. Barton contains an introduction followed by lists giving opera title, production date, theater and stars. Within each title the arrangement is chronological.
Grünwald, Alfred
Billy Rose Theatre Division | *T-Mss 1998-030
15 linear feet (30 boxes)
This collection contains manuscripts, librettos, scores, correspondence, professional papers, programs and reviews belonging to librettist, writer and theater critic Alfred Grunwald.