@book{20502,
	author = {LONG RAKSMEY,ឡុង រស្មី},
	title = {CALCULATION OF MOUNTAIN VOLUME USING DRONE PPK TICHNOLOGY AND DGPS,ការគណនាមាឌភ្នំដោយប្រើប្រាស់បច្ចេកវិទ្យា DRONE PPK និងឧបករណ៍​ DGPS},
	publisher = {rua},
	year = {2019},
	address = {phnom penh},
	url = {https://drive.google.com/file/d/1Bhf236FCxtNQE_QYpTQd9AgrO3redjqg/view?usp=share_link}
}