[1]Brown L,1995. Who Will Feed China: Wake-up Call for a Small Planet. The World Watch Environmental Alert Series. Norton and Co.,New York,USA.[2]Cai Yunlong,1990.
By means of SEDEX, ASPILA and XRF, depth-dependent changes of different phosphorus forms in sediment cores from specific areas of the offshore Changjiang Estuar
Integrating remote sensing, geographic information system (GIS) and fractal theory, change characteristics of tidal flats and tidal creeks in the Huanghe (Yello