Please keep the park clean 1938.
1 print on board (poster) : silkscreen, color. | Poster encouraging conservation of a natural resource area, showing a boy holding a butterfly net, sitting against a tree.

#KeepTheParkClean #theGreatDepression #posters #screenprints #color #stateparks&reserves #photopgraphy #LibraryOfCongress

https://www.loc.gov/pictures/item/98517123/