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Gandolfo, M. A., Nixon, K. C., Crepet, W. L., Ratcliffe, G. E. and Hortorium, L. H. 2000. Sorophores ofLygodium Sw. (Schizaeaceae) from the Late Cretaceous of New Jersey. Plant Systematics and Evolution. Vol. 221(1-2), pp. 113-123.