academic chapter by K.U. Kramer and P.S. Green
academic chapter by K.U. Kramer, T.C. Chambers, and E. Hennipman
academic chapter by K.U. Kramer
academic chapter by Kramer, Holttum, Moran & Smith
academic chapter by K.U. Kramer and R.M. Tryon
academic chapter by Hennipman, Veldhoen, & Kramer