Commerce; Voice of Philippine Business. Manila, Philippines: Board of Directors of the Chamber of Commerce of the Philippines, May 1956

Commerce; Voice of Philippine Business. Manila, Philippines: Board of Directors of the Chamber of Commerce of the Philippines, May 1956, Volume: Gilbert E60. Robert L. Gilbert First Issues collection, Gilbert. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/525541 Accessed December 27, 2025.