1. Union list of geologic field trip guidebooks of North America Author/Creator: Geoscience Information Society. Guidebook and Ephemeral Materials Committee Publication/Creation: Falls Church, Va. : American Geological Institute, [1978] Resource Type: Book Edition: [3d edition]. Access & Availability: Loading
2. Geologic field trip guidebooks of North America : a union list incorporating monographic titles Author/Creator: Geoscience Information Society. Guidebook and Ephemeral Materials Committee Publication/Creation: Houston, Tex. : P. Wilson Pub. Co., 1971 Resource Type: Book Access & Availability: Loading