  The effect of incoherent interlayer transport on the interlayer resistance of
a layered metal is considered. We find that for both quasi-one-dimensional and
quasi-two-dimensional Fermi liquids the angular dependence of the
magnetoresistance is essentially the same for coherent and incoherent
transport. Consequently, the existence of a three-dimensional Fermi surface is
not necessary to explain the oscillations in the magnetoresistance that are
seen in many organic conductors as the field direction is varied.
