Rule, W. M. 1977. A Comparative Study of the Foe, Huli and Pole Languages of Papua New Guinea. (Oceania Linguistic Monographs, 20.) Australia: University of Sydney. vi+124pp.
@book{hvRuleFoe,
author = {Rule, W. M.},
pages = {vi+124},
publisher = {Australia: University of Sydney},
series = {Oceania Linguistic Monographs},
title = {A Comparative Study of the Foe, Huli and Pole Languages of Papua New Guinea},
volume = {20},
year = {1977}
}