1. Ryder, M. L., Nature, 182, 781 (1958).
2. Ryder, M. L., Nature, 187, 130 (1960).
3. Ryder, M. L., Austral. J. Sci., 24, 246 (1961).
4. Yadin, Y., The Finds from the Bar–Kokhbo Period in the Cave of the Letters (Israel Exploration Society, Jerusalem, 1963).
5. Henshall, A. S., Proc. Soc. Antiq. Scot., 86, 1 (1952).