by D.G. Ackerman ... [et al.]. by H. T. Chapman ...[et al.]. by R. V. Ambartsumyan ...[et al.]. N. Acherkan ... [et al.]. by Bob Heyman ... [et al.]. by D.S. Henzel ... [et al.]. by F. Twyman ...[et al.]. by John W. Hinkelman ...[et al.]. edited by Frank Ackerman ... [et al.]. by P.T. Bolwijn ... [et al.].