00297    a2200097   4500082001500000100001900015245007000034260004100104300003100145650002300176  a625.84 POR  aPorter, Max L.  aAssessment of Dowel Bar Research/cMax L. Porter, Robert J. Guinn  aLowa :bLowa State University,c2002  avii, 72p. ;bill. ;c27 cm  aDowel Bar Research