5. Harold G. Henderson, An Introduction to Haiku (Garden City, N.Y.: Doubleday Anchor, 1958), p. 18.
6. Ibid., p. 18.
7. See Kenneth Yasuda, The Japanese Haiku (Rutland, Vt.: Tuttle, 1957).
8. Henderson, An Introduction to Haiku, p. 39.
9. Ibid., p. 49.
10. Ibid., p. 94.
11. Ibid., p. 108.
12. Ibid., p. 113.
13. Ibid., p. 146.
14. Issa, The Year of My Life, trans. Nobuyuki Yuasa (Berkeley: University of California Press, 1960), p. 104.