TY - JOUR AU - Walker, J F ID - 91318 TI - XLVIII.—On a phosphatic deposit in the Lower Greensand of Bedfordshire JF - Annals And Magazine of Natural History SN - 0374-5481 VL - 18 SP - 381 EP - 386 Y1 - 1866 UR - http://biostor.org/reference/91318 L2 - http://www.biodiversitylibrary.org/page/22252919 ER -