To supplement the Landowski papers, researchers should also consult the records and photographs of the Polish Fine Arts Club (Milwaukee Mss 63), which include photos of the Opera Club's productions of Halka, Martha, and Masked Ball, in particular portraying Rose Saskowski; the papers and photographs of Anthony J. Lukaszewski (Milwaukee SC 123), a co-founder of the Opera Club; and the papers of actor Jozef Kosciuk in the collection of M. Emil Pankiewicz (Milwaukee Mss 71). Kosciuk appeared in the 1925 film version of Halka.
