Title Science and Technology Indonesia e-ISSN:2580-4391 p-ISSN:2580-4405 Vol. 4, No. 2, April 2019 Subject Index 1. Assessment 2. Bio briquette 3. Co-precipitation 4. Fibonacci numbers 5. Flood control 6. Gibonacci numbers 7. Identities 8. Layered double hydroxides 9. Ldhs 10. Lucas numbers 11. MES Production 12. Particle size 13. Retention basin 14. Rubber seed 15. Rubber Seed Oil 16. Sum of cubes 17. Surfactants 18. Temperature 19. Zn/Al ldhs 20. Zn/Cr ldhs 21. Zn/Fe ldhs 1