TY  - BOOK
AU  - Butler,Richard W.
AU  - Boyd,Stephen W.
TI  - Tourism and national parks: issues and implications 
SN  - 0471988944
PY  - 2000///
CY  - Chichester
PB  - John Wiley & Sons
KW  - Tourism
KW  - Environmental aspects
KW  - National parks and reserves
KW  - Public use
N1  - Includes bibliographical references and index
UR  - http://www.loc.gov/catdir/toc/onix06/00699195.html
ER  -