Published by Irving Berlin, Inc, this "Fox-Trot" folio dates from 1937 and has all the band arrangements to Whistle While You Work. The booklet is eight double pages, two for each instrument (Guitar, Vocal trio, 2nd Trumpet in B flat, and 3rd Trumpet in B flat). It measures 10.5" x 14" (open).
The songbook was meant for free distribution to working professional bands and was "not for sale."
Images and info courtesy of the Michael Filippello Collection.