Uncertainty and Quality in Science for Policy
Uncertainty and Quality in Science for Policy is a 1990 book by Silvio Funtowicz and Jerome Ravetz , in which the authors explain the notational system NUSAP ( numeral , unit , spread , assessment , pedigree ) and applies it to several examples from the environmental sciences . 
<triplet> Uncertainty and Quality in Science for Policy <subj> 1990 <obj> publication date