Ruoti Guyin’s “The Essence of Partial Theories of Qintian” page 96

Liang Ruoyu’s Flying Star, Ziwei Doushu, The Logic and Skills of Hidden Flying Secrets

Liang Ruoyu’s Flying Star Ziwei Doushu’s “Six, Seven and Two Elephants in the Twelve Palaces” Generalized Basic Judgments

Ruoti Guyin finishing: Liu Jinfu teacher Ziwei Doushu complete course documents

Ruo Ti Gu Yin Liu Yao

Graphical illustration of Liu Ruogu [Geography Daughter Fu]

Haruoka Cangben Secret Biography Ziwei.pdf

A Thousand Secret Techniques_Edited by Su Ruohai

Summary of Ruoshan Haoguzhong Recipe