by D.W. Levi ... [et al.]. by K.N. Babin ... [et al.] by L.B. Welsh ... [et al.] by C.A. Brebbia ... [et al.]. by E.L. Ince ... [et al.] by I.C. Taig ... [et al.] by K.M. Case ... [et al.] by S.H. Lin ... [et al.]. by S.H. Yang ... [et al.] by A.E. Goresy ... [et al.]