Ross, Malcolm D.Clark, RossOsmond, MeredithRoss, MalcolmPawley, AndrewOsmond, Meredith2021-12-012021-12-01085883507XPL-C152.233http://hdl.handle.net/1885/253925application/pdf© 1998 Malcolm D. Ross, Ross Clark, Meredith Osmondhttp://creativecommons.org/licenses/by-sa/4.0Acts of Impact, Force and Change of State199810.15144/PL-C152.233 2021-12-01Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)