Not Used
Bernal, JP, Lachniet, M, McCulloch, MT, Mortimer, GE, Morales, P and Cienfuegos, E (2009). Holocene climate variability in Southwestern Mexico from speleothem delta O-18 and Mg/Ca. Geochimica et Cosmochimica Acta 73(13): A112.
Link to full text or pdf