00393 a2200145 4500 630.4 UNG 21627 33646 Unger, Paul W. Acuff soils distribution, importance, variability and management i,32p. 28cm Agriculture and related technology Blackstock, Dan A. pringle, Fred B. L 49086 49086 0 0 0 0 LEN MKDL MKDL LEN 2009-08-06 0 630.4UNG 52390 2009-08-06 00:00:00 0.00 2016-10-31 L