Duangdean Cheramakara. 1993. Laboratory investigation on efficacy of extract from sweetflag (Acorus calamus Linn.) rhizomes on brown planthopper (Nilaparvata lugens Stal.). Faculty of Graduate Studies, Mahidol University;
Duangdean Cheramakara. (1993) Laboratory investigation on efficacy of extract from sweetflag (Acorus calamus Linn.) rhizomes on brown planthopper (Nilaparvata lugens Stal.) . Mahidol University/Bangkok.
Duangdean Cheramakara. Laboratory investigation on efficacy of extract from sweetflag (Acorus calamus Linn.) rhizomes on brown planthopper (Nilaparvata lugens Stal.). . Bangkok:Mahidol University, 1993.
Duangdean Cheramakara. (1993) Laboratory investigation on efficacy of extract from sweetflag (Acorus calamus Linn.) rhizomes on brown planthopper (Nilaparvata lugens Stal.) . Mahidol University/Bangkok.