by James A. Richards, Jr. [and others]. by James A. Richards [and others]. by Charles S. Gray and others. by C. H. Bamford and others. by R. V. Ambartsumyan [and others. edited by James S. Duesenberry and others. by Ju Chin Chu and others. by Arthur W. Lo and others. by James Richardson. by Stephen H. Cradall and others.