1. ......................
Author: Newton, Harold William.
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Sun,Sun - spots
Classification :
QB
521
.
N4
2. Sunspots
Author: Bray, R J
Library: Central Library of Sharif University of Technology (Tehran)
Subject: ، Sun-- Spots
Classification :
QB
525
.
B7
3. Sunspots
Author: Bray, R.J.
Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)
Subject: Sun-spots
Classification :
QB
525
.
B78
1979
4. The face of the sun
Author: Newton
Library: Central Library and Documents Center of Tehran University (Tehran)
Subject: Sun,Sun - spots
Classification :
QB
521
.
N4
