It is shown that if G is a weakly amenable unimodular group then the Banach algebra A(p)(r)(G) = A(p) boolean AND L-r (G), where A(p) (G) is the Figa-Talamanca-Herz Banach algebra of G, is a dual Banach space with the Radon-Nikodym property if 1 <= r <= max(p,p'). This does not hold if p = 2 and r > 2.