edited by Sam F. Seely and James R. Weisiger. edited by Diane Suitt Gilleland, James H. Swisher. edited by T. Mulvey and R. K. Webster. edited by William J. Glynn and James G. Barnes. edited by George O. Abell and Barry Singer. edited by D. D. Klemm and H. J. Schneider. edited by J G. Tully and R. F. Whitcomb. edited by James H. Rust and Lynn E. Weaver. edited by Edmond S. Perry and Arnold Weissberger. edited by Robert C. Whitford and James R. Foster.