No.	Title	Date
4601	Ansiedad	1959
4602	Ansiedad ( external resource | internal citation )	1946
4603	Ansiedad
4604	Ansiedad ( external resource | internal citation )	1955
4605	Ansiedad ( external resource | internal citation )
4606	Ansiedad ( external resource | internal citation )
4607	Ansiedad ( external resource | internal citation )
4608	Ansiedad ( external resource | internal citation )	1948
4609	Ansiedad ( external resource | internal citation )	1948
4610	Ansiedad ( external resource | internal citation )
4611	Ansiedad ( external resource | internal citation )
4612	Ansiedad ( external resource | internal citation )	1946
4613	Antarctic Climate Change and the Environment	2009-11-25
4614	Antarctic Ice's Future Still Mired in Its Murky Past	2011-07-22
4615	Antarctic ice-sheet loss driven by basal melting of ice shelves	2012-04-26
4616	The Antarctic Peninsula's retreating ice shelves	2012
4617	Antarctic temperature and global sea level closely coupled over the past five glacial cycles	2009-06-21
4618	Ante la Inminencia del próximo Sínodo	1987-08-03
4619	Ante un espejo ( external resource | internal citation )
4620	Ante una cruz me juró ( external resource | internal citation )