Perturbation Methods in The Quantum Mechanics of n-Electron Systems

1951. First Published. 302 pages. This is an ex-Library book. Grey dust jacket with lettering over blue cloth. Library copy stamp to fep. Well bound and clean pages, with mild tanning to text block edges. Some rub-marking and tanning to pastedowns and endpapers with inscriptions to front. Boards have moderate shelf wear, with rubbing and marking. Light bumping to corners and crushing to spine ends. Book has noticeable forward lean, with light sunning to spine and edges. Unclipped jacket has light edge-wear with minor tears and chipping. Moderate tanning and creasing, with rubbing and marking.