1. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont Author/Creator: Drake, Avery Ala, 1927- Publication/Creation: For sale by the Branch of Distribution, U.S. Geological Survey Resource Type: Book Access & Availability: Loading
2. The Accotink schist, Lake Barcroft metasandstone, and Popes Head Formation--keys to an understanding of the tectonic evolution of the northern Virginia Piedmont Author/Creator: Drake, Avery Ala, 1927- author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1981 Resource Type: Book Access & Availability: Loading
3. An appraisal of the Great Basin Middle Cambrian trilobites described before 1900 Author/Creator: Palmer, Allison R., author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1954 Resource Type: Book Access & Availability: Loading
4. An appraisal of the Great Basin Middle Cambrian trilobites described before 1900, Author/Creator: Palmer, Allison R. Publication/Creation: Washington : U.S. Govt. Print. Off, 1954 Resource Type: Book Is Part Of: U.S. Geological Survey professional paper, no. 264A-264J. Access & Availability: Loading