Seasonal snow cover :  a guide for measurement compilation and assemblage of data. 

 - París :  UNESCO :  Belgium; IASH; Geneva :  W,  1970. 
 - 38 p.  il., map. 
 - Technical papers in hydrology ;  2 .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>551.322 =20 SEA No.2.