TY  - BOOK
AU  - Penna,Anthony N.
TI  - The human footprint: a global environmental history 
SN  - 9781405187725
U1  - 304.2 22
PY  - 2010///
CY  - Malden, MA
PB  - Wiley-Blackwell
KW  - Human ecology
KW  - History
KW  - Ecology
KW  - Climatic changes
KW  - Natural history
N1  - Includes bibliographical references and index
ER  -