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, 13:58, 22 July 2014
{{publication
| image = development-geology-reference-manual.png
| series = Methods in Exploration
| title = Development Geology Reference Manual
| part = Laboratory methods
| chapter = Capillary pressure
| frompg = 221
| topg = 225
| author = Charles L. Vavra, John G. Kaldi, Robert M. Sneider
| editor = ''Needs editor''
| link = http://archives.datapages.com/data/specpubs/methodo1/data/a095/a095/0001/0200/0221.htm
| pdf = http://archives.datapages.com/data/specpubs/methodo1/images/a095/a0950001/0200/02210.pdf
}}
The pressure at which mercury first enters the sample (after the mercury has filled any surface irregularities on the sample) is termed the ''displacement pressure'' (''P''<sub>d</sub>).
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