00357nam a2200121 a 450000500170000008200160001710000200003324500470005326000360010030000250013650000500016170000240021120251203090658.0  a577.54bENV  aWebb, Robert H.  aEnvironmental effects of off Road vehicles  aNew YorkbSpringer-Verlagc1983  axxi,534p.c22cm.bHB  aincludes bibliographical references and index  aWilshire, Howard G.