The house of Vasa and the house of Austria : correspondence from the years 1587 to 1668. Pt. 1, The times of Sigismund III, 1587-1632. Vol. 1 / edited by Ryszard Skowron ; in collaboration with Krzysztof Pawłowski, Ryszard Szmydki, Aleksandra Barwicka, Miguel Conde Pazos, Friedrich Edelmayer, Rubén González Cuerva, José Martínez Millán, Tomasz Poznański, Manuel Rivero ; [eng. transl. Łukasz Borowiec, Margerita Beata Krasnowolska, Piotr Krasnowolski].