Ketprom, J.; Rasrikreangkai, I.; Poommai, S.; Dampin, N. Development Guidelines of Interpretive Signs for Self-Guided Mangrove Nature Trails: A Case Study of The King’s Royally Initiated Laem Phak Bia Environmental Research and Development Project. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal 2020, 7, 201-207.