TY - BOOK AU - Higgins J R TI - Completeness and basis properties of sets of special fucntions T2 - Cambridge Tracts in Mathematics; 72 U1 - B39, L7-;1 PY - 1977/// CY - Cambridge PB - Cambridge university press KW - Special functions KW - Mathematics N1 - Appndix (1-2) (p ER -