Bers Lipman; John Fritz; Schechter Martin, . (1964). Partial differential equations Vol II. : Interscience.
Bers Lipman; John Fritz; Schechter Martin, . 1964. Partial differential equations Vol II. : Interscience.
Bers Lipman; John Fritz; Schechter Martin, . Partial differential equations Vol II. : Interscience. 1964.