.245
a	The Problem of newsprint and other printing paper.
h	Book
.005
a	00000000000000
.260
a	Paris: Unesco, 1949.
b
c	2000
.084
a	YM Que
.300
a	111 hlm.
b	21 cm.
c	111 hlm.; 21 cm.
.336
a	Book