Assertion: alligator snapping turtle | /r/HasProperty | illustrated by numerous authorities
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text: The Alligator Snapping Turtle has been illustrated by numerous authorities (Pope, 1939; Carr, 1952; Ernst and Barbour, 1972, 1989; Mount, 1975; Behler and King, 1979; Pritchard, 1979,1989, 1992; Caldwell and Collins, 1981; Smith and Brodie, 1982; Obst, 1986,1998; Alderton, 1988; [Sievert] and Sievert, ; Dundee and Rossman, 1989; Ashton and Ashton, 1991; Carmichael and Williams, 1991; Ernst et al., 1994; Lamar, 1997; Conant and Collins, 1998; Powell et al., 1998; Bartlett and Bartlett, 1999a, b; Behler, 1999; Phillips et al., 1999; Johnson, 2000; Pough et al., 2001; Zug et al., 2001).