@book{13806,
	author = {World Health Organization. Pharmaceuticals Programme.},
	title = {The International pharmacopoeia = Pharmacopoea internationalis : volume. 4. Tests, methods, and general requirements, quality specifications for pharmaceutical substances, excipients, and dosage forms.},
	publisher = {World Health Organization,},
	year = {1994.},
	address = {Geneva : }
}