1. A Cretaceous Pityoxylon with marginal tracheides;Bailey;Ann. Bot.,1911
2. Contributions to Plant Anatomy;Bailey,1954
3. A cycadophyte from the North American coal measures;Bassler;Am. J. Sci., Ser. 4,1916
4. The infra-red spectra of macerals;Bent;Fuel,1961
5. Systematic paleontology of Lower Cretaceous deposits of Maryland; Plantae;Berry;Maryland Geol. Surv., Lower Cretaceous,1911