Thompson, B.N.; Brathwaite, R.L.; Sherwood, A.M. 1988 Atlas of mineral resources of the ESCAP region, Volume 4: New Zealand, explanatory brochure. Bangkok: UNESCO. 28 p.
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Thompson, B.N.; Brathwaite, R.L.; Sherwood, A.M. 1988 Atlas of mineral resources of the ESCAP region, Volume 4: New Zealand, explanatory brochure. Bangkok: UNESCO. 28 p.