Iowa, Nebraska
THE GSI COMPANY (Three Locations)
Boone, IA
P. O. Box 633
1928 Marshall St.
Boone, IA 50036
800-262-3811 - Toll Free
515-432-5408 - Phone
515-432-5902 - Fax
gsidesmoines@msn.com
Duane Hartzler
515-290-7845 - Cell
Ankeny, IA
355 N. E. 28th St.
Ankeny, IA 50021
515-963-9735 - Office
515-963-9736 - Fax
Jon Gustafson
515-230-1239 - Cell
gustafsonj@gsiboone.com
Humboldt, NE
63488 712 Trail
Humboldt, NE 68376
402-862-2353 - Office
678-202-1315 - Fax
David Knorr
402-862-5029 - Cell
knorr@windstream.net
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