000 nam a22 4500
110 _aSkogerboc, Gaylordv., Walker, Wynn, R. and Bocnkinkird, Va Son.
245 _aCulverts for flow measurement in irrigation systems.
260 _aColorado
_bAmerican Society of agricultural engineers.
_c1972
942 _c22
999 _c5930
_d5930