| Reference | {Deposit:: WAR MINERALS MEMORANDUM - THE DURHAM MINES - MAGNETITE 1944}{Deposit:: GAULT, H. R., MINERAL RESOURCES (IN) GEOLOGY AND MINERAL RES}{Deposit:: OF BUCKS CO., PA., BULL. C9, 1959 PA. GEOLOGICAL SURVEY}{Deposit:: BASCOM, F., WHERRY, STOSE AND JONAS, GEOLOGY AND MINERAL RES}{Deposit:: OF THE QUAKERTOWN-DOYLESTOWN DISTRICT PA. AND N. J., USGS BU}{Deposit:: 1931}{Deposit:: BAYLEY, W. S., PRECAMBRIAN GEOLOGY AND MINERAL RESOURCES OF}{Deposit:: AWARE WATER GAP AND EASTON QUADRANGLES, N. J. AND PA., USGS}{Deposit:: 20, 1941} |