@book{81791,
	author = { G.G.Weber and M.Saafi.},
	title = {Preliminary report on the farm management survey conducted at the three island groups of Tongatapu, Ha'apai and Vava'u.},
	publisher = {German-Tongan Technical Cooperation-Plant Protection Project cum Agricultural Economist},
	year = {1980},
	address = {Tonga}
}