Summary of multispectral flood inundation mapping in Iowa., B. E. Hoyer, G. R. Hallberg, and J. V. Taranik, 1974, 57 p., 6 figs., 3 tables, 10 pl. The Public Information Circulars were developed to meet immediate informational needs and include remote sensing technology and applications; environmental geology and aquifer protection; and economic geology.