TY  - BOOK
ED  - U. S. Soil Conservation Service.
TI  - Drainage of agricultural land: a practical handbook for the plan ning, design, construction and maintainace of agricultural drainage sys tems
U1  - 631.6 
PY  - 1973///
CY  - Port Washington, N. Y.
PB  - Water Information Center
KW  - Drainage
N1  - Includes bibliographical references
ER  -