FUNCTIONAL MORPHOLOGY AND EVOLUTION OF XIPHOSURIDS.BERGSTROM J.sdFOSSILS AND STRATA; NORWAY; (EVOL. MORPHOL. TRILOBITA, TRILOBITOIDEA MEROSTOMATA. PROC. NATO ADV. STUD. INST.; OSLO; 1973),1973,1975, NUM. 0004, P. 291 A 305Miscellaneous

NEW XIPHOSURID TRAILS FROM THE UPPER CARBONIFEROUS OF NORTHERN ENGLAND.HARDY P.1970; PALAEONTOLOGY; GBR; 1970(8), VOL. 13, NUM. 002 , P. 188 A 190Miscellaneous

SOME ECOLOGICALLY SIGNIFICANT ASPECTS OF THE BEHAVIOR OF THE HORSESHOE CRAB LIMULUS POLYPHEMUSRUDLOE AE.1979; DISS. ABSTR. INT., B SCI. ENG.; ISSN 0419-4217; USA; DA. 1979; VOL. 40; NO 2; PP. 577; RESUME SEULEMENT;_THESE PH.D./FLORIDA STATE UNIVERSITY (USA)/1978Thesis

A new, giant xiphosurid from the lower Namurian of Weardale, County Durham = Un nouveau xiphosurid géant provenant du Namurien inférieur de Weardale, dans le Comté de DurhamSIVETER, D. J; SELDEN, P. A.Proceedings of the Yorkshire Geological Society. 1987, Vol 46, Num 2, pp 153-168, issn 0044-0604Article