@book{6319,
	author = {Levin, Barbara B.},
	title = {Case studies of teacher development :},
	publisher = {L. Erlbaum Associates,},
	year = {2003.},
	address = {Mahwah, N.J. :},
	url = {http://www.loc.gov/catdir/enhancements/fy0709/2002019618-d.html}
}