Leyden International Bureau

• Conference (1938)
• General meeting
• General meeting (1938)
• News
• Officersmeeting
• Provisional financial report
• Report on the peace
• Secretary's report of the Leyden International Bureau in the year 1936-1937
• [Letter from H.J. Heering, regarding agenda and resolutions of the Leersum Conference]
• [Message]
• [News]
• [Officers-Meeting ...]