"Middle and Upper Ordovician Sandstone-Shale Sequences of the Mid-Hudson Region West of the Hudson River" - Guidebook Field Trip 2, 1983

"Middle and Upper Ordovician Sandstone-Shale Sequences of the Mid-Hudson Region West of the Hudson River" - Guidebook Field Trip 2, 1983, Box: 18. Jack Oliver papers, 16-14-3269. Division of Rare and Manuscript Collections. https://archives.library.cornell.edu/repositories/2/archival_objects/247793 Accessed December 28, 2025.