video Research by Liliana Usvat
https://www.ucbooksale.com/
Books
"Forgotten Knowledge" By Liliana Usvat
https://www.ucbooksale.com/13_ForgottenKnowledge/13_ForgottenKnowledgeDescription.php
"Buildings And People " By Liliana Usvat
https://www.ucbooksale.com/14_BuildingsAndPeople/14_BuildingsAndPeopleDescription.php
