Rudolph was Witte’s direct student. This book explains the 90° Dial and how to calculate midpoints without a computer. Key chapter: "The 8 Trans-Neptunians and their Orb Influence." Availability: Out of print since 1976. PDF copies circulate among Uranian study groups, but most lack the fold-out dial charts.

However, acquiring these texts is notoriously difficult. Many are out of print, lost in translation, or hoarded by private collectors. If you have searched for , you are likely aware of the struggle. This guide will walk you through the most essential titles, explain why they are relics, and show you how to ethically access them.