@book{1417,
	author = {Castillo de Carvajal, Mayra },
	title = {Lo difícil hecho fácil :},
	publisher = {Coordinación Educativa y Cultural Centroamericana, CECC/SICA, },
	year = {2009.},
	address = {San José, Costa Rica :},
	edition = {1a ed.},
	url = {https://isae.metabiblioteca.org/cgi-bin/koha/opac-retrieve-file.pl?id=748e499f77f167c3e6cc4689953a909d}
}