Nowe materiały do kontaktów Drohiczyna nad Bugiem z Nowogrodem Wielkim = Novye materialy k svâzâm Drohičina na Zapadnom Buge s Velikim Novgorodom = New Materials Concerning Contacts between Drohiczyn on the Bug and Novgorod the Great / Krystyna Musianowicz. - Musianowicz, Krystyna (1933- ).