books.google.it - Thorough discussion of the various types of bonds, their relative natures, and the structure of molecules and crystals...http://books.google.it/books/about/The_Natune_of_the_Chemical_Bond_and_the.html?hl=it&id=L-1K9HmKmUUC&q=dipole&utm_source=gb-gplus-shareThe Natune of the Chemical Bond and the Structure of Molecules and Crystals