Putanga 1: Ko Zedtwitz te tumuaki o te American Contract Bridge League i te tau 1932, tētahi o ngā whakahaere i whakakotahitia ai te American Bridge League i te tau 1937. Putanga 2: Ko Von Zedtwitz te perehitini o te American Bridge League i te tau 1932, tētahi o ngā whakahaere i whakakotahitia ai te American Contract Bridge League i te tau 1937. Pātai: He ōrite te tikanga o te rerenga 1 me te rerenga 2? He Ae, he Kore rānei?
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