Permanent rules.

Bibliographic Details
Corporate Authors: Texas Water Development Board, Texas. Department of Water Resources
Format: Book
Language:English
Published: [Austin] : The Board, [1977?]
Subjects:
Description
Item Description:Cover title.
At head of title: Texas Department of Water Resources.
"GP-1-2."
Physical Description:879 unnumbered pages in various pagings : maps ; 28 cm.