TY  - BOOK
AU  - Singh, S. P. 
TI  - Sustainable Tourism / 
SN  - 9788183766883 
U1  - 338.4791  
PY  - 2019///.
CY  - New delhi: 
PB  - ABD, 
KW  - Environmental protection
KW  - Sustainability
KW  - Tourism
N1  - Includes bibliographical references
ER  -