TY - BOOK ED - International Commission of Snow and Ice. ED - Unesco. TI - Perennial ice and snow masses: a guide for compilation and assemblage of data for a world inventory AV - GB651 .T4 no. 1 U1 - 551.4/8/08 s PY - 1970///] CY - [Paris] PB - UNESCO/IASH KW - Ice KW - Snow N1 - At head of title: A contribution to the International hydrological decade ER -