PENGARUH MEDIA SMW (West and McBride’s Modified ES Medium) DENGAN MODIFIKASI VITAMIN B12 PADA MEDIA KULTUR TEKNIS TERHADAP PERTUMBUHAN Sargassum sp. = THE EFFECT OF MEDIA SMW (West and McBride's Modified ES Medium) WITH MODIFICATION OF VITAMIN B12 ON TECHNICAL CULTURE ON THE GROWTH OF Sargassum sp - PRASETYANING AYU WARDHANI, 141511133139 (2019)