Urbanek, A., & Towe, K. M. Ultrastructural Studies on Graptolites, 2: The Periderm and Its Derivatives in the Graptoloidea / by Adam Urbanek and Kenneth M. Towe. Washington : Smithsonian Institution Press.
Chicago Style CitationUrbanek, Adam, and Kenneth M. Towe. Ultrastructural Studies On Graptolites, 2: The Periderm and Its Derivatives in the Graptoloidea / By Adam Urbanek and Kenneth M. Towe. Washington : Smithsonian Institution Press.
MLA CitationUrbanek, Adam, and Kenneth M. Towe. Ultrastructural Studies On Graptolites, 2: The Periderm and Its Derivatives in the Graptoloidea / By Adam Urbanek and Kenneth M. Towe. Washington : Smithsonian Institution Press.
Warning: These citations may not always be 100% accurate.