Knapp, D. G. (1963). Some notes on field patterns in relation to dip poles. Department of Commerce. Coast and Geodetic Survey.
Cita Chicago Style (17a ed.)Knapp, David G. Some Notes on Field Patterns in Relation to Dip Poles. Washington: Department of Commerce. Coast and Geodetic Survey, 1963.
Cita MLA (9a ed.)Knapp, David G. Some Notes on Field Patterns in Relation to Dip Poles. Department of Commerce. Coast and Geodetic Survey, 1963.
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