Changes in oxygen 18 during the last 8,000 years fluctuations in a tropical lake (Laguna Chincanab, Yucatan, Mexico) 

 -  Limnology and Oceaniography, 6, p.1-27, 1973 .
<br/><br/> Changes in O18: O16 ratios in shell carbonates of freshwater snails mainly reflect changes in the isotopic composition of the loke water during periods of shell growth. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MÉXICO - YUCATÁN - LAGUNA CHICHANCANAB - ESTUDIO<br/>MÉXICO - YUCATÁN - LAGUNA CHICHACANAB - MEDIO AMBIENTE