@online {342, title = {Minerals Yearbook for Massachusetts}, publisher = {USGS}, keywords = {$\#$Collecting, $\#$EducationalResources, $\#$MassGeology, $\#$MineralDatabase, $\#$MineralResources, $\#$Minerals, industrial, minerals, quarries}, url = {http://minerals.usgs.gov/minerals/pubs/state/ma.html} }