The Geological Society of America

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Fossil gap analysis supports early Tertiary origin of trophically diverse avian orders: Comment and Reply
Charles R. Marshall
Geology(1999), 27(1):95
http://dx.doi.org/10.1130/0091-7613(1999)027<0095:FGASET>2.3.CO;2

The Geological Society of America
The Geological Society of America
GeoScienceWorld
GeoScience World