by Bruno Nascimbene ; with the collaboration of Elisabetta Bergamini. by Renato Constantino, with the collaboration of Letizia R. Constantino. Boris I. Bittker with the collaboration of Brannon P.Denning. by Sterling Seagrave with the collaboration of Peggy Seagrave. Dieter Schmidt ; with the collaboration of Lee Seldon. Georg P. Muller with the collaboration of Volker Bornschier. Jeffrey M. Stibel ; with the collaboration of Erik Calonius and Peter Delgrosso. R. Creighton Buck, with the collaboration of Ellen F. Buck.