Recently we had a technical problem with the Forum, such that all posts and new members were lost between 27 May - 20 June 2020.
In this area a member had posted about the Topocentric System, and luckily I had save the link he had given.
Fortunately I had saved the link so would like to re-post it for the benefit of all:
https://juanestadella.com/Predictive_As ... dition.pdf
(I hope that member sees this and re-applies).
If you have any books you would like to recommend, please do so here.
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