@book{332832,
	title = {Specific activities of natural rocks and soils at quaternary intraplate volcanism north of Sana'a, Yemen},
	publisher = {Journal of Medical Physics},
	url = {http://www.jmp.org.in/showBackIssue.asp?issn=0971-6203;year=2012;volume=37;issue=1;month=January-March}
}