Friedrich Achleitner ... [et al.] Friedrich Achleitner ... [et al. Benedict Walker ... [et al.] Benedict Walker ... [et al. Fred Fedler ... [et al.] Judith A. Barter ... [et al.] Merrill Singer ... [et al.] writers, John Wagner ... [et al.] Bernd Polster ... [et al. Bernd Polster ... [et al.].