@base . a , , ; , , ; "Bulletin of the Chemical Society of Ethiopia." ; ; ; ; "1011-3924" ; ; ; "1011-3924" ; ; "1011-3924" ; "Bulletin of the Chemical Society of Ethiopia" , "Bulletin of the Chemical Society of Ethiopia." ; . a ; . . a , ; "Bulletin of the Chemical Society of Ethiopia" . "Ethiopia" . a ; "1011-3924" ; . a . a ; "1011-3924" ; . a ; ; "20041117084200.0"^^ ; ; .