Ingham, C.E. 1968 Tongariro power development geophysical surveys. 1. Moawhango tunnel route. [s.l.]: [s.n.]. Report / Geophysics Division 52 12p.
Abstract: In the period 18 March - 30 June 1968, a substantial number of geophysical investigations were made along two possible tunnel routes which link the proposed Moawhango reservoir with a holding pond near the mouth of the Waihohonu Stream. The seismic refraction method was used for the bulk of the work though some magnetic measurements were made on and close to the basalt near the mouth of the Waihohonu Stream (auth.)