Roviana (rug-rug) = 3 (Wider communication). Lingua franca before 1880, especially for church purposes in the Western Province. Widely used as a trade language before the colonial era beginning in 1880.
Inter-Household Variations in Subsistence Strategies within a Rural Society of Roviana, Solomon Islands: An Analysis of Agricultural Production and Cash Income in relation to Socio-Demographic Factors
Solomon Islands languages: An internal classification. Canberra, Australia: Department of Linguistics, Research School of Pacific Studies, Australian National University.