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Science (New York, N.Y.)|February 11, 1972
Aragonite Crystals within Codiacean Algae: Distinctive Morphology and Sedimentary ImplicationsR D Perkins, M D McKenzie, P L Blackwelder
Injury Prevention : Journal of the International Society for Child and Adolescent Injury Prevention|February 5, 2009
Safety behaviours among Alaskan Native and American Indian people living in AlaskaD G Redwood, K D Hagan, R D Perkins, et al.
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