Ziefle, H. Historical forces, German departments, and the curriculum in small liberal arts colleges in the Midwest: Helmut Ziefle. Teaching German in twentieth century America.(2001).

Ziefle, Helmut. "Historical Forces, German Departments, and the Curriculum in Small Liberal Arts Colleges in the Midwest: Helmut Ziefle." Teaching German in Twentieth Century America.(2001) .

Ziefle, Helmut. "Historical Forces, German Departments, and the Curriculum in Small Liberal Arts Colleges in the Midwest: Helmut Ziefle." Teaching German in Twentieth Century America.(2001), .