References
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- Cochran , W. G. 1977 . Sampling Techniques., , 3rd edition 428 New York : John Wiley and Sons .
- Ellis , J. C. and Kimberley , M. O. 1995 . Volume estimation of export pulplogs. . New Zealand Journal of Forestry Science , 25 : 123 – 132 .
- Ellis , J. C. and Elliott , D. A. 2001 . Log Scaling Guide for Exporters. Forest Research Bulletin No. 221. Forest Research, Rotorua, NZ, 53 pp.