TY - BOOK AU - Aggarwala Ram Ratan AU - Parthasarathy S Gu. AU - University of Delhi. Faculty of Mathematical Sciences. Department of Mathematics ED - University of Delhi. Faculty of Mathematical Sciences. Department of Mathematics TI - Bessels's and Mathieu's functions as applied to ultrasonics PY - 1954/// CY - Delhi PB - University of Delhi India KW - MATHEMATICS ER -