M. E. H. Rotival. Balance v1, n3 1955, 12 Leon Haft. Balance v1, n3 1955, 8 Paul Nelson. Balance v1, n2 1955, 14 Herbert A Tessler, Leon Moed, Joseph DAmelio and William H. Liskman. Balance v1, n2 1955, 6 Robert Hamilton. Balance v1, n3 1955, 11 Hans Hoffmann. Balance v3, n4 1957, 13 Hans Hoffmann. Balance v3, n4 1957, 13