TY - BOOK AU - Birla Natasha AU - University of Delhi. Faculty of Inter-disciplinary and applied sciences. Department of Electronic Science ED - University of Delhi. Faculty of Inter-disciplinary and applied sciences. Department of Electronic Science TI - Theoratical studies in degenerate and nearly degenerate four-wave mixing using photorefractive materials. (Supervisor : Kapoor, Avinashi) PY - 1997/// KW - ELECTRICAL ENGINEERING ER -