For barcoding periodicals, I'd recommend following whatever
method you use for your books.  It's easier for your circulation
staff to have to look in only one place (also easier for those
doing the "sticking").  For what it's worth, we barcode our
journals on the back on the lower left corner.

Judy Schneider
US GAO Library
sz5@nihcu.bitnet
sz5@cu.nih.gov (Internet)