Horst, Louis Instrumentalist text concert programs aat eng Location: Martha Graham Collection, Box 311. For information about this resource, refer to finding aid available at Record created through migration from the Performing Arts Encyclopedia Database. Graham, Martha Martha Graham collection, 1896-2003 http://hdl.loc.gov/loc.music/ihas.200153745 Reproduced with permission of Martha Graham Resources, a division of The Martha Graham Center of Contemporary Dance, www.marthagraham.org.