Heuer - Psychology of Intelligence Analysis - paperback or softback - - X555z

Witt - Spectrum of Secrets - New paperback or softback - X555z

Aubry - Spectrum - New paperback or softback - 13 - X555z

Zellgert - Spectrum of Light - New paperback or softback - X555z

Anonymous - Analysis of Permissible Explosives - paperback or softback - X555z

Watt - A Study Of Social Morality... - New paperback or softback - X555z

Lockyer - Studies in Spectrum Analysis - paperback or softback - 29 - X555z