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2
-
Soils of Papua New Guinea : [covering the published literature for 1938-1973] / comp. by Commonwealth bureau of soils.
- 883.2
- Commonwealth Agricultural Bureaux,
- 1977.
- Slough :
-
Soils of Mexico and Central America (1970-1977) / Commonwealth agricultural bureaux.
- 874
- Commonwealth Agricultural Bureaux,
- 1978.
- Slough :