The difference between the potentiometric surfaces of the Aquia Aquifer, September 1982 and September 1997 in Southern Maryland /

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Bibliographic Details
Author / Creator:	Curtin, Stephen E.
Imprint:	[Baltimore, Md.] : U.S. Geological Survey ; Denver, Colo. : Branch of Information Services [distributor], [1999]
Description:	1 map : photocopy ; 20 x 17 cm, on sheet 28 x 22 cm.
Language:	English
Series:	Open-file report ; 99-81 U.S. Geological Survey open-file report ; 99-81.
Subject:	Groundwater -- Maryland, Southern -- Maps. Aquifers -- Maryland, Southern -- Maps. Water table -- Maryland, Southern -- Maps. Aquia Formation -- Maps.
Cartographic data:	Scale [ca. 1:710,000] (W 77⁰20ʹ--W 76⁰00ʹ/N 39⁰15ʹ--N 38⁰00ʹ).
Format:	E-Resource Map Microform U.S. Federal Government Document
URL for this record:	http://pi.lib.uchicago.edu/1001/cat/bib/12688870

Hidden Bibliographic Details
Other authors / contributors:	Andreasen, David C. Mack, Frederick K. Geological Survey (U.S.) Maryland Geological Survey. Maryland. Resource Assessment Administration.
Notes:	Blackline print. Available via Internet from the USGS web site. Address as of 8/13/07: http://pubs.er.usgs.gov/usgspubs/ofr/ofr9981; current access via PURL.
GPO item no.:	0624-H (MF) 0624-H (online)
Govt.docs classification:	I 19.76:99-81

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