Page 1 : Results 1 to 5 on 22
November 2000As ecosystems mangroves are rich but they exist in a state of delicate balance.
November 2000Since dengue hemorrhagic fever appeared in the 1950s in South-East Asia many successive epidemics have occurred in Thailand.
October 2000Who were the first inhabitants of Micronesia? When did they settle there? Remains of such inhabitation are abundant enough in the western isles of Micronesia, but up to now that has not been the case for islands in the centre and in the east of the group.
October 2000Since 1975, campaigns to control the main vector of Chagas disease have been conducted in Brazil.