Zahtamal, Zahtamal, Fifia Chandra, Ridha Restila, and Tuti Restuastuti. 2020. “Defecation Behavior in Elementary School Age Children Who Live Along the Kampar River Riau Province”. JURNAL KESEHATAN LINGKUNGAN 12 (2):87-96. https://doi.org/10.20473/jkl.v12i2.2020.87-96.