[50] Ibid.

[51] Op. cit., p. 73.

[52] Ibid.

[53] Vol. II, pp. 1-17.

[54] Op. cit., p. 4.

[55] Ibid., p. 12.

[56] Ibid., p. 3.

[57] Ibid., p. 14.

[58] Ibid., p. 13.

[59] Op. cit., p. 11.