Senders: Bausch, Pieter
- Pieter Bausch to SLC, 9 December 1908 · Amsterdam, Netherlands · UCLC38428 CU-MARK
- Pieter Bausch to SLC, 27 February 1909 · Amsterdam, Netherlands · UCLC38747 CU-MARK
- Pieter Bausch to SLC, 17 March 1909 · Amsterdam, Netherlands · UCLC40158 CU-MARK
- Pieter Bausch to SLC, 27 April 1909 · Amsterdam, Netherlands · UCLC40223 CU-MARK
- Pieter Bausch to SLC, 22 June 1909 · Amsterdam, Netherlands · UCLC40274 CU-MARK
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