Michael H. Glantz-NCAR/UCAR
Richard W. Katz-NCAR/UCAR
When is a drought a drought?
Nature
1977-05-19
267
5608
192-193
article
Refereed
Copyright 1977 Nature Publishing Group
http://dx.doi.org/10.1038/267192a0
http://n2t.net/ark:/85065/d7qr4wk4