Allan (1993b, 1995c, 1996a), Allan et al. (1996b), Branch (1988), Cooper et al. (1976), CSIR (1994), Grindley and Dudley (1988), Kalejta and Allan (1993), Kalejta-Summers et al. (in press a), Rowlands (1983), Ryan et al. (1988), Scott (1954), Summers et al. (1976, 1977), Turpie (1995), Underhill and Cooper (1984), Winterbottom (1960, 1968b).