http://www.das.state.ne.us/materiel/purchasing/doing_business.htm
Doing Business with the State of Nebraska

http://www.das.state.ne.us/materiel/purchasing/
procurementmanual/procurementmanual.htm
State Purchasing Bureau Procurement Manual

http://www.das.state.ne.us/materiel/purchasing/vendormanual/vendormanual2000.pdf
Vendor Manual