Sutep Sahaya. 1999. Study on neem seed products utilization for cotton insect pests management. Program of Entomology, Kasetsart University;
Sutep Sahaya. (1999) Study on neem seed products utilization for cotton insect pests management . Kasetsart University/Bangkok.
Sutep Sahaya. Study on neem seed products utilization for cotton insect pests management. . Bangkok:Kasetsart University, 1999.
Sutep Sahaya. (1999) Study on neem seed products utilization for cotton insect pests management . Kasetsart University/Bangkok.