TY - BOOK AU - Polchinski,Joseph TI - String theory SN - 0521633036 : U1 - 530.14 PY - 1998/// CY - Cambridge, UK PB - The University Press KW - String models KW - Superstring theories N1 - Includes bibliographical references and index; Vol. 1. An introduction to the bosonic string -- v. 2. Superstring theory and beyond ER -