Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
SHELL
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RIO GRANDE VALLEY SECTION
Brownsville
Matamoros
Monterrey
Nuevo Laredo
Laredo
El Paso
Oklahoma City
Wichita Falls
Dallas
Fort Worth
Port Worth
Arlington
Abilene
Sweetwater
Browmwood
Tyler
Shreveport