Co-optimisterne [1929]musical workDet Er forbudt for born under 16 aarCosta, Vincent deComposerDe Costa, VincentComposerFolke, DanLyricistFolke, DanLyricistBerg, Leif, lyricistLyricistBerg, LeifLyricist[1929]printscoregeneralCosta, Vincent de, Composer; Folke, Dan, Lyricist; Berg, Leif, lyricist, LyricistM1508 Co-optimisterne [1929]loc.natlib.m1508.6324http://lcweb2.loc.gov/diglib/ihas/loc.natlib.m1508.6324/item.html?ID=63246324M1508 Co-optimisterne [1929]It's Showtime! Sheet Music from Stage and Screenhtml/songsinshows/songsinshows-home.htmlm1508m1508showsloc.natlib.m1508.6324http://lcweb2.loc.gov/diglib/ihas/loc.natlib.m1508.6324/Music Division, Library of CongressDLC150709loc.natlib.m1508.6324