TY - BOOK AU - ASTM TI - 1980 Annual book of ASTM standards part 21 : cellulose; leather; flexible barrier materials PY - 1980/// CY - Philadelphia PB - American Society for Testing and Materials UR - http://krc.clri.res.in:80/cgi-bin/koha/opac-detail.pl?biblionumber=6960 ER -