title: Appearance of Hipparion in the tertiary of the Siwalik hills of north India, Kashmir and west Pakistan.
authors.affiliation: Peabody Museum of Natural History, Yale University, New Haven, Connecticut 06520, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Simons
authors.forename: D
authors.initials: D
authors.lastname: Pilbeam
authors.forename: S J
authors.initials: SJ
authors.lastname: Boyer