see - Mass 911 Office website
see - Framingham file for 2006 911 study
see - https://web.archive.org/web/20161129010536/http://www.nmcog.org/Websites/nmcog/images/RECC/AECOM_RECC_Implementation_Plan_2-28-14.pdf - Lowell area 911 center study - 150 pages - 2014
see - https://web.archive.org/web/20161129011501/http://www.nmcog.org/Websites/nmcog/images/RECC/Lowell-RECC-Revised-Draft-Feasibility-Study-Report-2011_09_13.pdf - Lowell area 911 center study - 2011
see - https://sites.google.com/site/massachusettspublicsafety/home/barnstable-county/2011-county-psap-study - for Barnstable County 911 study from 2011
see - https://web.archive.org/web/20161129003116/http://ci.ashby.ma.us/document/Ashby_Townsend_Reg_MAP.pdf - March 2010 - Ashby / Townsend 911 Study
see - https://web.archive.org/web/20161129003932/https://sudbury.ma.us/police/final-regional-emergency-dispatch-report-with-addendum/ - Sudbury area 911 study March 2012