GVSOA Grand Valley Soccer Officials Association - USSF in Grand Rapids and the Lakeshore
GLASRA (WMSOA's counterpart in Lansing)
WMSRA (Our counterpart in Kalamazoo)
Michigan Referee Committee (site for USSF Referees in Michigan)
NISOA (National Intercollegiate Soccer Officials Association)
West Michigan Soccer (information on WMSL, GVSA and local College and High School play)
Michigan Champions League (information on the MCL)
Michigan State Premier Soccer League (information on the MSPSL)
REFEREE EQUIPMENT, CLOTHING, BOOKS AND VIDEOS
Locally the Soccer Loft (located inside of the Kentwood Soccer Spot) has a good selection of equipment for officials, including long and short sleeved shirts in USSF Yellow, Black and Red.
There are a number of large mail order vendors also:
Epic Soccer - very low price; good selection
Law Five
Official
Sports - has everything; the only
source for USSF and NISOA logo merchandise
Reed Swain (Books and Videos)