(1974). Facilities planning summary: Title II, Federal Water Pollution Control Act, amendments of 1972.
Chicago-čujuhus (17. p.)Facilities Planning Summary: Title II, Federal Water Pollution Control Act, Amendments of 1972. 1974.
MLA-čujuhus (9. p.)Facilities Planning Summary: Title II, Federal Water Pollution Control Act, Amendments of 1972. 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.