Survey, U. S. G. (1977). Ground-water levels in the United States, 1974: Southeastern states. Washington : United States Government Printing Office.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Survey, United States. Geological. Ground-water Levels in the United States, 1974: Southeastern States. Washington : United States Government Printing Office, 1977.
MLA -ийн эшлэл (9 дэх хэвлэлт)Survey, United States. Geological. Ground-water Levels in the United States, 1974: Southeastern States. Washington : United States Government Printing Office, 1977.
Анхааруулга: Эдгээр ишлэлүүд үргэлж 100% үнэн зөв биш байж магадгүй.