Steven Weinberg, The Forces of Nature, Bulletin of the American Academy of Arts and Sciences 29(4): 13—29 (1976).
3
W. B. Yeats, The coming of wisdom with time (1910), in Peter Allt and R. K. Alspach, eds., The Variorum Edition of the Poems of W. B. Yeats (Macmillan Co., New York, 1957. Reprinted by permission of M. B. Yeats, Miss Anne Yeats, Macmillan Publishing Company of New York, and The Macmillan Company of London & Basingstoke).
