@book {33,
	title = {Roadside Geology of Massachusetts},
	year = {2001},
	publisher = {Mountain Press},
	organization = {Mountain Press},
	keywords = {educational resources, GEOLOGY, massachusetts},
	author = {James W. Skehan}
}
@article {35,
	title = {Geologic Fieldtrip Guidebook database for North America},
	publisher = {American Geolosciences Institute},
	keywords = {educational resources, GEOLOGY, guidebooks, massachusetts},
	url = {http://guide.georef.org/dbtw-wpd/guidens.htm}
}
@online {23,
	title = {National Science Education Standards},
	publisher = {Kentucky Geological Survey},
	keywords = {earth science education standards, education, educational resources},
	url = {http://www.uky.edu/KGS/education/edustand.htm}
}
@online {48,
	title = {Water Science for Schools (USGS)},
	keywords = {curriculum, education, educational resources, school, water},
	url = {http://ga.water.usgs.gov/edu/}
}
