Encyclopedias:
https://scroll.lib.westfield.ma.edu/login?url=https://go.gale.com/ps/i.do?st=T003&qt=OQE~school+resource+officers~~PUB_BK_CL_IDX~on&sw=w&ty=bs&it=search&sid=bookmark-GVRL&p=GVRL&s=Relevance&u=mlin_w_westsc&v=2.1&asid=fd9112ec
Trade publications:
https://www.proquest.com/search/2336396?accountid=6199
Journals
https://www.proquest.com/search/2336393?accountid=6199
Handbooks:
https://ebookcentral.proquest.com/lib/westfielduniv-ebooks/search.action?op=advance&query=%22school%20resource%20officers%22&fullTitle=handbook
Newspapers:
https://scroll.lib.westfield.ma.edu/login?url=https://www.proquest.com/search/2336398?accountid=6199