00339nam a2200109Ia 4500008004100000082001300041082000800054245010800062245002500170260002500195300000900220231017s9999    xx            000 0 und d  a551.3072  bLAW 4aThe Nature of Rockfall as the Basis for A New Fallout Area Design Criteria for 0.25:1 Slopes - Nov 1994 0cLawrenced A. Pierson  bLawrenced A. Pierson  c30cm