FERMILAB-COLLIDER. Measurement of the TQ TQBAR production cross section in pbar-p collisions at a centre-of-mass energy of 1.8 TeV. Data comes from an integrated luminosity of 125pb-1 taken from 1992-96. There are 39 candidate events in the dilepton and lepton+jet decay channels. Results are given for a TQ mass of 173.3 GeV.