TY - BOOK AU - Lopez, Angelo Felice ED - American Mathematical Society TI - Noether-lefschetz theory and the picard group of projective surfaces T2 - Memoirs of the American Mathematical Society SN - 0-8218-2500-3 AV - QA571 L66 PY - 1991/// CY - Providence, rhode island PB - American mathematical society KW - Grupos de Picard KW - Superficies algebraicas KW - Variedades algebraicas N1 - "january 1991,volume 89, number 438 (first of 3 numbers)" ER -