In: Dinosaur provincial Park Times, 1993, p. 3
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In: Canadian journal of earth sciences = Journal canadien des sciences de la terre, 1993, vol. 30, p. 102
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In: Burroughs bulletin : new series, 1993, vol. 16, p. 21
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In: Dinosaurian faunas of China, 1992///
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In: Journal of vertebrate paleontology, 1992/12/3//
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In: Ultimate dinosaur, 1992, p. 184
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In: Journal of vertebrate paleontology, 1991/3//
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In: Journal of vertebrate paleontology, 1991/11/3//
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In: Geotimes, 1991, p. 18
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In: Dinosaur systematics : approaches and perspectives, 1990, p. 107
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