The data assembled in these files has been obtained and reformatted
from a number of sources.
	USGS Open-File Report 00-193
	Principal Facts for Gravity Stations in Vacinity of San Bernardino,
	Southern California, Megan Anderson, Carter Roberts, and Robert Jachens
Gdata2.txt and Gdata3.txt
	USGS Open-File Report 93-217-A
	Principal Facts and Base Station Descriptions for Gravity Data
	Compiled for the Santa Ana 1-degree by 2-degree Quadrangle,
Gdata4.txt (note only Free Air and Bouguer)