Additional authors: J. Ben-Asher, J. Gale, R. Koppel, Denise Blanc, L. Pinkas, R. Brun, A, Gac, Maria Baille et al., P.E. Rappeport, D. Pasternak, A. Livneh, V. Amdursky, I. Marer, J. Katan, A. Greenberger, A. Grinstein, H. Alon, Claude Wacquant et al., B. Acock, J.J. Longuenesse, N. Zieslin, E. Berninger; special publication no. 126; added t.p. in Hebrew