H. F. Ludwig has written:
'Environmental guideline[s] for coastal zone management in
Thailand, zone of Pattaya' -- subject(s): Coastal engineering,
Coastal zone management, Environmental aspects, Environmental
aspects of Coastal engineering, Environmental aspects of Coastal
zone management
'Environmental guidelines for coastal zone management in
Thailand, inner gulf zone'
'Final report on appropriate environmental quality standards for
Bhutan' -- subject(s): Environmental policy