Bouchard, J. F. (1973). The impact of roads in the gumine region of Papua New Guinea. Port Moresby: University of Papua and New Guinea.
Παραπομπή Chicago StyleBouchard, J. F. The Impact of Roads in the Gumine Region of Papua New Guinea. Port Moresby: University of Papua and New Guinea, 1973.
Παραπομπή MLABouchard, J. F. The Impact of Roads in the Gumine Region of Papua New Guinea. Port Moresby: University of Papua and New Guinea, 1973.
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