Elliptic Partial Differential Equations of Second Order

From the reviews:&quote;This is a book of interest to any having to work with differential equations, either as a reference or as a book to learn from. The authors have taken trouble to make the treatment self-contained. It (is) suitable required reading for a PhD student. Although the material has been developed from lectures at Stanford, it has developed into an almost systematic coverage that is much longer than could be covered in a year's lectures&quote;. Newsletter, New Zealand Mathematical Society, 1985 &quote;Primarily addressed to graduate students this elegant book is accessible and useful to a broad spectrum of applied mathematicians&quote;. Revue Roumaine de Mathematiques Pures et Appliquees,1985