<div><span class="short_text" id="result_box"><span title="Hola, por favor me pueden enviar estos paper ." style="BACKGROUND-COLOR: #ebeff9"><font size="5">Hi, please can send me this paper.</font></span></span></div>
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<div>Guttman, N. B., 1999: Accepting the Standandardized Precipitation Index: a calculation algorithm. <i>J. Amer. Water Resour. Assoc.</i>, <b>35(2)</b>, 311-322. </div>
<p><a href="http://iri.columbia.edu/~grover/DataLibrary/References/McKee_etal_1993.pdf">McKee, T.B., N. J. Doesken, and J. Kliest, 1993</a>: The relationship of drought frequency and duration to time scales. In <i>Proceedings of the 8th Conference of Applied Climatology, 17-22 January, Anaheim, CA</i>. American Meterological Society, Boston, MA. 179-184.
<p><a href="http://iri.columbia.edu/~grover/DataLibrary/References/McKee_etal_1995.pdf">McKee, T.B., N.J. Doesken, and J. Kliest, 1995</a>: Drought monitoring with multiple time scales. In <i>Proceedings of the 9th Conference of Applied Climatology, 15-20 January, Dallas TX</i>. American Meteorological Society, Boston, MA. 233-236.
<p><br></p><br clear="all"><br>-- <br>Juan C. Sulca Jota <br>FCF - UNMSM<br></p></p>