This is a preview. Log in through your library . Abstract This paper discusses a method of estimating numerical characteristics of unobservable stages of carcinogenesis from data on tumor size at ...
A peninsula jutting into Guatemala’s Lake Petén Itzá is the site of the ancient Maya city of Nixtun-Ch’ich’. (Courtesy Timothy Pugh/Itza Archaeological Project) For years, archaeologist Timothy Pugh ...
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