title: Climate change: Old droughts in New Mexico.
authors.forename: John
authors.initials: J
authors.lastname: Williams
mesh_terms: D002118:Calcium / Q000032:analysis; D002244:Carbon / Q000032:analysis; D002980:Climate; D055864:Droughts / Q000266:history* / Q000706:statistics & numerical data; D005618:Fresh Water; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry; D057232:Global Warming / Q000706:statistics & numerical data; D017752:Greenhouse Effect / Q000706:statistics & numerical data; D049690:History, Ancient; D006802:Human Activities; D009516:New Mexico; D011058:Pollen / Q000737:chemistry; D011891:Rain; D012621:Seasons; D013696:Temperature; D013997:Time Factors
chemical_list: D002244:Carbon; D002118:Calcium