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In the absence of such indexes , researchers can spend countless hours searching through records that may or may not contain information about their ancestors . You can watch Spanish TV on satellite channels and borrow Spanish films to view . Extraction of data from databases is often considered a difficult task even to many Excel power users as the databases can come from many heterogeneous sources . Whether users want to make bulk modifications , attach or detach references or even report on the status of attachments , RefManager can complete many tasks ten to a hundred times faster than MicroStation on its own . Drying retards decomposition , reduces likelihood of spreading contamination , and can render the items less offensive to examine . Part-time students can complete the program in three to four years .