http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a new way to estimate the numbers of undiscovered hydrocarbon accumulations in sparsely drilled areas
"Checkerboard method"--estimating undiscovered hydrocarbon accumulations
"U.S. Department of the Interior, U.S. Geological Survey"--Title page verso.
Includes bibliographical references (page 8).