IPHV Courier. Berlin: I.P.H.V. International League of Stamp-Dealers, 1935

IPHV Courier. Berlin: I.P.H.V. International League of Stamp-Dealers, 1935, Volume: Gilbert C253. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/526256 Accessed March 23, 2026.