  We prove the following version of Poincare duality for reduced
$L_{q,p}$-cohomology: For any $1<q,p<\infty$, the $L_{q,p}$-cohomology of a
Riemannian manifold is in duality with the interior $L_{p',q'}-cohomology for
$1/p+1/p'=1$, $1/q+1/q'=1$.
