Composition and origin of phosphate nodules from the Dogger Formation,Yorkshire Coast,Northeast England

A. M. EL-KAMMAR, K. BJØRLYKKE
1983 The Journal of the Japanese Association of Mineralogists Petrologists and Economic Geologists  
doi:10.2465/ganko1941.78.269 fatcat:cqlm4zc6w5dwjazkecmnflmota