Title from Internet index screen (viewed Aug. 14, 2003).
"Bulletin 1839-K was published in 1992. It is being put online in July 2003 with revisions and is being called version 2.0. There is no online version 1.0. The text has not been changed from that which was published originally, but plate 1 includes a gamma-ray log trace, placed beside each well, which was not included on the original version of the plate"--Version history.