1. ......................

Author:

Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)

Subject: ، Electron optics,، Vacuum-tubes

Classification :
QC
447
.
F36

3. ......................

Author:

Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)

Subject: ، Physical optics

Classification :
QC
355
.
S815

4. .......................

Author:

Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)

Subject: ، Physical optics

Classification :
QC
355
.
J4
1957

5. ......................

Author:

Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)

Subject: ، Physical optics

Classification :
QC
355
.
J4
1957a

6. ......................

Author:

Library: Central Library and Information Center of Ferdowsi University of Mashhad (Khorasan Razavi)

Subject: ، Physical optics

Classification :
QC
355
.
R55
1954