1. Baker , G 1959 Mem. natn. Mus., Vict.
2. Chapman , D. R. Larson , H. K. Anderson , L. A. 1962 Aerodynamic Evidence Pertaining to the Entry of Tektites into the Earth's Atmosphere , N.A.S.A. Tech. Report R-134
3. Zahringer , J. 1963 Isotopes in tektites Tektites J. O'Keefe
4. O'Keefe , J. 1963 The origin of tektites Tektites J. O'Keefe
5. Cohen , A. J. 1963 Asteroid- or comet-impact hypothesis Tektites J. O'Keefe