BIBLIOGRAPHY CONTRIBUTOR W.P. Heinrichs First name W.P. Last name Heinrichs Bibliography entries by this contributor King, David, P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, and W.P. Heinrichs. 1995. “Rubʿ [Quadrant]”. In Encyclopaedia of Islam, New Edition, 2ndnd ed., 8:574-75. Leiden: E. J. Brill.
