don't throw an error trying to make a bibliography with an item with no date (thanks Dan)
don't throw an error trying to make a bibliography with an item with no date (thanks Dan)


retorquere/zotero,hoehnp/zotero,egh/zotero,robamler/zotero,robamler/zotero,sendecomp/zotero,egh/zotero,rmzelle/zotero,rmzelle/zotero,robamler/zotero,hoehnp/zotero,gracile-fr/zotero,sendecomp/zotero,LinuxMercedes/zotero,rmzelle/zotero,sendecomp/zotero,LinuxMercedes/zotero,gracile-fr/zotero,adunning/zotero,LinuxMercedes/zotero,hoehnp/zotero,gracile-fr/zotero,retorquere/zotero,adunning/zotero,aurimasv/zotero,retorquere/zotero,adunning/zotero,egh/zotero,fbennett/zotero