1. [Ca5(PO4)3(F, Cl, OH)], inwhich the (F, Cl, OH) radical may be represented
2. Adams JK, Burkhart B. 1967. Diagenetic phosphates from the northern Atlantic coastal plain. Abstr Annu Geophys Soc Am Assoc Soc Joint Meeting, New Orleans, LA. Nov20-22,1967. Program, p2.
3. TRANSITION OF PHOSPHITE TO PHOSPHATE IN SOILS
4. Solubilization of insoluble phosphates by some soil fungi isolated from nursery seedbeds