Library of Congress. Copyright Office, U.S. Copyright Renewals, 1958 January - June
“ GRIEG, EDVARD. Solvejg's song; biographical sketch and glossary, rev. ed. with phrasing, fingering, pedaling, and instructive annotations on form and structure and interpretation by Arthur Edward Johnstone; pf. (Composition catalog no.563) © 28Nov30; AA55898. Art Publication Society (PWH) ”
