00324nam a2200097Ia 4500008004100000082003300041100004600074245007200120260002700192300000700219140113s9999    xx            000 0 und d  a"631.67:1976"" (082.2)   L6"  aInternational Drip Irrigation Association  aProceedings of the 4th  International Drip irrigation congress 1976  a1976bIDIAcCalifornia  a76