Inside Cover JTL Vol 20, No 2, Juli 2019

JTL provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.

JTL by PTL-BPPT is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at http://ejurnal.bppt.go.id/index.php/JTL