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I 19. 2 :W 29/ 48 : The strategy for improving water-quality monitoring in the United States : final report of the Intergovernmental Task Force on Monitoring Water Quality.
I 19. 3 2100 : Paleomagnetic analysis of Miocene basalt flows in the Tehachapi Mountains, California / by J.B. Plescia, Gary J. Calderone, and Lawrence W. Snee.