1. Interplanetary encounters
Author: / by Ernst J. Opik
Library: Central Library and Documents Center of Mazandaran University (Mazandaran)
Subject: Celestial mechanics.,Gravitation.,Planets- Orbits.
Classification :
QB355
.
O6
1976
2. The oscillating universe
Author: / by Ernst J.Opik.
Library: National Library and Archives of Islamic Republic of Iran (Tehran)
Subject: نجوم,کیهانآفرینی
Classification :
QB
۴۴
/
الف
۹
الف
۵ ۱۳۳۹
