Franks, J.W. (1960). "Interglacial deposits at Trafalgar Square, London.". The New Phytologist59 (2): 145–150. doi:10.1111/j.1469-8137.1960.tb06212.x.
J W Franks (9 September 1959). "Interglacial Deposits at Trafalgar Square, London". New Phytologist59 (2): 145–152. doi:10.1111/j.1469-8137.1960.tb06212.x.