References
About.com, 2013, Desert Pavement, viewed 7 March, 2013, <http://geology.about.com/library/bl/images/bldesertpave.htm>.
About.com, 2013, Yardang, viewed 6 March, 2013, <http://geology.about.com/od/structureslandforms/ig/erosional/yardang.htm>.
Britannica Encyclopedia, 2013, Barchan (sand dune), viewed 6 March, 2013, <http://www.britannica.com/EBchecked/topic/53068/barchan>.
Britannica Encyclopedia, 2013, Seif (sand dune), viewed 6 March, 2013, <http://www.britannica.com/EBchecked/topic/532817/seif>.
Wikianswers, 2013, What is deflation hollows, viewed 7 March, 2013, <http://wiki.answers.com/Q/What_is_deflation_hollows>.
WiseGEEK, 2013, What causes an Oasis in the desert?, viewed 7 March, 2013, <http://www.wisegeek.com/what-causes-an-oasis-in-the-desert.htm#slideshow>.
About.com, 2013, Yardang, viewed 6 March, 2013, <http://geology.about.com/od/structureslandforms/ig/erosional/yardang.htm>.
Britannica Encyclopedia, 2013, Barchan (sand dune), viewed 6 March, 2013, <http://www.britannica.com/EBchecked/topic/53068/barchan>.
Britannica Encyclopedia, 2013, Seif (sand dune), viewed 6 March, 2013, <http://www.britannica.com/EBchecked/topic/532817/seif>.
Wikianswers, 2013, What is deflation hollows, viewed 7 March, 2013, <http://wiki.answers.com/Q/What_is_deflation_hollows>.
WiseGEEK, 2013, What causes an Oasis in the desert?, viewed 7 March, 2013, <http://www.wisegeek.com/what-causes-an-oasis-in-the-desert.htm#slideshow>.