Rudolph and J. C. Volkwein worked for F. Bechtel before acquiring his sheet music and small goods businesses.
[6] Volkwein acquired Joseph Erskine Agnew's music business in 1939.
[7] Vollwein Brothers published James V. Colonna's "America Forever" march after Pearl Harbor was attacked.
[8] In 1960, they published Gertrude Rohrer’s state song “Pennsylvania.”[9] The University of Maryland has a collection of their band music.
[10] The Carnegie Library of Pittsburgh has a box of Volkwein music books.