1. Advanced Chemical Diagnostics and Instrumentation Group; Los Alamos MS J565
2. Environmental Dynamics and Spatial Analysis Group; Los Alamos MS J495
3. Bioscience Division, B-S1, MS E529, Los Alamos National Lab.; Los Alamos NM 87545
4. USDA-NRCS Jornada Experimental Range, P.O. Box 30003, MSC 3JER; New Mexico State Univ.; Las Cruces NM 88003-8003