Tilson, Ronald Lewis.

Monogamous mating systems of gibbons and langurs in the Mentawai Islands, Indonesia [microform] / by Ronald Lewis Tilson. - Ann Arbor, Mich. : University Microfilms International, 1981. - 1 microfilm reel : positive ; 35 mm.

Thesis (Ph.D.) - University of California, 1980.

Y910040399


Gibbons--Sexual behavior.
Presbytis--Sexual behavior.