Please keep the park clean. Clough, Stanley Thomas, artist. Ohio : Federal Art Project, W.P.A., Poster encouraging conservation of a natural resource area, showing a boy holding a butterfly net, sitting against a tree. Date stamped on verso: Oct 18 1938.
wpa, public service announcement, wildlife, national park, vintage, vintage posters, graphic design, free download, retro prints, classic posters, Please Keep the Park Clean - Vintage Public Service Announcement Poster