A black and white museum poster contains the name J.B. Halvorsen near the top.
A man on a cover of Ex Libris J.B. Halvornsen.
a page that says 'ex libris j.b. halvorsen' on it
A book titled Ex Libris has an ornately drawn design on the cover.
A copy of Ex Libris by J. B. Halvorsen from the Museum Bergense.