http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Pleistocene Vertebrates from the upper becerra (Becerra superior) formation, valley of Tequixquiac, Mexico, with notes on other pleistocene forms
HIBBARD, Claude W.: -- Pleistocene Vertebrates from the upper -- becerra(Becerra superior)formation,val- -- ley of Tequixquiac,Mexico,with notes on -- other pleistocene forms. - Ann Arbor -- 1955. S.47-96,IX Taf. 8° -- (Contributions from the Museum of Pale- -- ontol.,Univ.of Michigan.12,5.) -- 1956! -- P..
Contributions from the Museum of Paleontol., Univ. of Michigan 12,5