by Birkel, Michael L., Angell, Stephen W.
Published in Quaker studies (04.12.2023)

by Wenzel, E, Birkel, L, Scheffler, P, Waldhausen, P, Jung, F
Published in International angiology (01.01.1989)

by King, Abby C., Carl, Fran, Birkel, Lindy, Haskell, William L.
Published in Preventive medicine (01.05.1988)

by Birkel, Michael L
Published in Cistercian studies quarterly (01.07.2002)

by Birkel, L, Scheffler, P, Jung, F
Published in VASA. Supplementum (1988)

by Scheffler, P, Birkel, L, Grub, K R, de la Hamette, D
Published in VASA. Supplementum (1988)