Pennapa Kongrattanachok. 2005. Carbon sequestration in cassava and para rubber plantation, Rayong province. Field of Study Appropriate Technology for Resources and Environmental Development, Mahidol University;
Pennapa Kongrattanachok. (2005) Carbon sequestration in cassava and para rubber plantation, Rayong province . Mahidol University/Bangkok.
Pennapa Kongrattanachok. Carbon sequestration in cassava and para rubber plantation, Rayong province. . Bangkok:Mahidol University, 2005.
Pennapa Kongrattanachok. (2005) Carbon sequestration in cassava and para rubber plantation, Rayong province . Mahidol University/Bangkok.