00443    a2200157   4500100004100000102000700041606001100048215001700059005001700076101000800093200008900101205001200190001000600202675001200208210006500220  a20040220                 y50          aCH  aNormas  a11 p.d30 cm20180928123441.00 aeng  aISO 690. 1987, Documentation - Bibliographic referencesecontent, form and structure  a2nd ed.80255  a006 INT  a[S.l.]cInternational Organization for Standardizationd1987