Using data collected during the 1992-93 collider run at Fermilab,  
CDF has made measurements of correlated $b$ quark cross section where one $b$ 
is detected from a muon from semileptonic decay and the second $b$ is detected
with secondary vertex techniques. We report on measurements of the cross
section as a function of the momentum of the second $b$ and as a function of
the azimuthal separation of the two $b$ quarks, for transverse momentum of the
initial $b$ quark greater than 15 GeV. Results are compared to QCD 
predictions.