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Happy (bài hát của Pharrell Williams) Happy Birthday to You Happy Sugar Life Happy Camp Happy (nhân vật manga) Happy-Go-Lucky Happyland Happy New Year (bài hát) Happy Birthday (phim truyền hình) Happy FeetTài liệu tham khảo
WikiPedia: Happy_Valley,_Oregon http://www.gustaf.com/hvonweb/hvhist1.htm http://www.pdx.edu/media/p/r/prc_2005_Population_T... //tools.wmflabs.org/geohack/geohack.php?language=v... //tools.wmflabs.org/geohack/geohack.php?language=v... http://www.ci.happy-valley.or.us http://bluebook.state.or.us/local/cities/ek/happyv...