Buku2 Erich Von Daniken menceritakan hubungan antara ET dengan Ancient Human Civilization :
http://www.ziddu.com/download/8271947/ErichVonDaniken-TheGoldoftheGods.pdf.html http://www.ziddu.com/download/8271948/ErichVonDaniken-MiraclesoftheGods.pdf.html http://www.ziddu.com/download/8271949/ErichVonDaniken-ReturntotheStars.pdf.html http://www.ziddu.com/download/8271952/ErichVonDaniken-ChariotsoftheGods.pdf.html
