Dear colleagues, I would like to know if and where a code exists which performs semiempirical calcns. of solid's band structure. I have heard of VEH (valence effective Hamiltonian) method and wish that someone kindly directs me to the right source. Many thanks! Dr I.Novak,Dept.of Chemistry,NUS,Singapore 0511 bitnet:chmigorn at.at nusvm internet: chmigorn at.at nus.sg