The unique significance and origin of the Cretaceous-Tertiary boundary
Subtitle: historical context and burdens of proof
By: Graham Ryder.
Contributors: United States. National Aeronautics and Space Administration.
Series: [NASA contractor report] -- NASA-CR-204187.; NASA contractor report -- NASA CR-204187.
Publisher: National Aeronautics and Space Administration; National Technical Information Service, distributor
Published: 1996
Place of publication: [Washington, DC; Springfield, Va
Language: eng
Format: Microform
Subjects: Cretaceous-Tertiary boundary; Extinction; Hypotheses
Notes: Shipping list no.: 99-0069-M.

Microfiche. [Washington, D.C. : National Aeronautics and Space Administration, 1997] 1 microfiche.