@Map {238,
	title = {Preliminary bedrock geologic map of the Ayer quadrangle, Massachusetts},
	year = {2006},
	publisher = {Massachusetts Geological Survey},
	edition = {OFR-06-02},
	abstract = {<p>
	This preliminary version of the Bedrock Map of the Ayer Quadrangle (Kopera, 2006) has been removed pending the release of an updated version in the near future. The above version should be considered outdated. If you would like a copy of this map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot] umass[dot]edu</p>
},
	keywords = {$\#$BedrockMaps, $\#$MGSPub, arsenic, Ayer, ayer granite, Berwick formation, Boxborough, chelmsford granite, Clinton-Newbury Fault, Devens, Fort Devens, Groton, Harvard, Jahns, LITTLETON, Merrimack Terrane, mylonite, nashoba, Nashua Trough, Oakdale formation, Shepley{\textquoteright}s Hill Landfill, Shirley, tadmuck brook schist, Worcester Formation},
	url = {http://www.geo.umass.edu/stategeologist/},
	author = {Joseph P Kopera}
}
@Map {247,
	title = {Progress report of bedrock geologic mapping of the Lowell quadrangle, Massachusetts},
	year = {2010},
	publisher = {Massachusetts Geological Survey},
	edition = {PM-09-01},
	abstract = {<p>
	Maps in Progress are not distributed to the public. If you would like to see a copy of this map, please contact Joseph Kopera at jkopera[at]geo[dot]geo[dot]umass[dot]edu</p>
},
	keywords = {$\#$BedrockMaps, $\#$MGSPub, Berwick formation, Chelmsford, Clinton-Newbury Fault, Dracut, Dracut diorite, Dracut gabbro, Dracut pluton, gabbro, Jahns, Lowell, Methuen, nashoba, Nashoba Formation, Tewksbury, Tyngsborough},
	author = {Richard H Jahns and Joseph P Kopera}
}
