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Merrill, R. et al. 1977. The Hills Pond peridotite, Woodson County, Kansas: a richterite-bearing Cretaceous intrusive with kimberlitic affinities. International Kimberlite Conference: Extended Abstracts. 2, 1 (Sep. 1977), 220–222. DOI:https://doi.org/10.29173/ikc999.