Selden, pp. 26-28, 158.

Saw.

Griffith, pp. 20-27.

Barnard, pp. 114-124.

Selden, pp. 41-43, 179-182.

Wheeler, pp. 466-473.

Hammacher, pp. 309-366.

Goss, pp. 26-41.

Sickels, pp. 76-79, 84.

Smith, R. H., 43-55.