Dutta, S.K., and S.C.D. Sah. 1972. “Palynostratigraphy of the Sedimentary Formations of Assam, India:4. Age of the Laitryngew-Mawkma Coal-Bearing Sandstones and Their Relationship With the Charra Formation”. Journal of Palaeosciences 21 ((1-3):48-51. https://doi.org/10.54991/jop.1972.1468.