TY - RPRT TI - A case study using ECHO(Extraction and Classification of Homogeneous Objects) for analysis of multispectral scanner data AU - Scholz, D. K. AU - Russell, J. AU - Lindenlaub, J. C. AU - Swain, P. H. PY - 1977 UR - https://ntrs.nasa.gov/citations/19780004561 ID - 19780004561 ER -