Zahtamal, Z., Chandra, F., Restila, R. and Restuastuti, T. 2020. Defecation Behavior in Elementary School Age Children Who Live Along the Kampar River Riau Province. JURNAL KESEHATAN LINGKUNGAN . 12, 2 (Apr. 2020), 87–96. DOI:https://doi.org/10.20473/jkl.v12i2.2020.87-96.