  The quantum cosmology of the string effective action is considered within the
context of the Bianchi class A minisuperspace. An exact unified solution is
found for all Bianchi types and interpreted physically as a quantum wormhole.
The solution is generalized for types ${\rm VI_0}$ and ${\rm VII_0}$. The
Bianchi type IX wavefunction becomes increasingly localized around the
isotropic Universe at large three-geometries.
