Thomas G. Trippe, Angela Barbaro-Galtieri, Robert L. Kelly, Alan Rittenberg, Arthur H. Rosenfeld, and George P. Yost^*

• Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720, USA

Naomi Barash-Schmidt

• Brandeis University, Waltham, Massachusetts 02154, USA

Claude Bricman, Richard J. Hemingway, and Michael J. Losty

• CERN, CH-1211 Genève 23, Switzerland

Matts Roos

• Department of Nuclear Physics, University of Helsinki, Helsinki 17, Finland

Vladimir Chaloupka

• Stanford Linear Accelerator Center, Stanford, California 94305, USA

Betty Armstrong^*

• Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720, USA

• ^*The Berkeley Particle Data Center is jointly supported by the U. S. Energy Research and Development Administration, the Office of the Standard Reference Data of the National Bureau of Standards, and the National Science Foundation.