Estimating Aboveground Biomass in Tropical Forests: Field Methods and Error Analysis for the Calibration of Remote Sensing Observations. - Fábio Guimarães Gonçalves; Robert N. Treuhaft; Beverly E. Law; André Almeida 001; Wayne Walker; Alessandro Baccini; João Roberto dos Santos; Paulo M. L. A. Graça (Remote. Sens., 2017)