Abo-Khatwa, AN 1997: Isolation and identification of usnic acid and atranorin from some Saudi-Arabian lichens. - Arab Gulf Journal of Scientific Research15(1): 15-28. [RLL List # 169 / Rec.# 89] Keywords: ASIR MOUNTAINS/ CHEMISTRY/ SAUDI ARABIA
Abstract: 5 fig. 2 schemes [Chemical study of Usnea articulata and Parmelia tinctorum.]