Tchaikovsky - Expert System's Champion - New paperback or softback - X555z

Howland - Elements of the Conic Sections - New paperback or softback - - X555z

Munsell - Atlas of the Color System - New paperback or softback - 92 - X555z

Brelsford - A new system of reading - paperback or softback - X555z

Dadant - System of Beekeeping - New paperback or softback - 65 - X555z

Aldiss - Enemies of the System - New paperback or softback - X555z

Gage - Lymphatic System - New paperback or softback - 17 - X555z

Lane - A System of Practical Arithmetic - New paperback or softback - X555z