TY - BOOK ED - International Congress of Crystallography ED - National Research Council of Canada ED - Congress International de Cristallographie TI - Twelfth International Congress of Crystallography: collected abstracts, 16-25 August 1981 AV - QD901 I57 1981 PY - 1981///] CY - Otawa, Canada PB - National Research Council of Canada KW - CristalografĂ­a KW - Congresos N1 - Ingles y frances ER -