Gerry Mulligan at Schiphol (NL), 18 May 1957
Eric Koch (ANEFO)
<a rel="nofollow" class="external text" href="http://proxy.handle.net/10648/a95fd78a-d0b4-102d-bcf8-003048976d84">GaHetNa (Nationaal Archief NL)</a> 908-612