ÖZKAN, M. T. 1981. The Sunspot Observations Made in 1979. Review of Faculty of Science, University of Istanbul , vol.Serie C, no.46 , 199-223.

ÖZKAN, M. T., (1981). The Sunspot Observations Made in 1979. Review of Faculty of Science, University of Istanbul , vol.Serie C, no.46, 199-223.

ÖZKAN, Mustafa. "The Sunspot Observations Made in 1979," Review of Faculty of Science, University of Istanbul , vol.Serie C, no.46, 199-223, 1981

ÖZKAN, Mustafa T. . "The Sunspot Observations Made in 1979." Review of Faculty of Science, University of Istanbul , vol.Serie C, no.46, pp.199-223, 1981

ÖZKAN, M. T. (1981) . "The Sunspot Observations Made in 1979." Review of Faculty of Science, University of Istanbul , vol.Serie C, no.46, pp.199-223.

@article{article, author={Mustafa Türker ÖZKAN}, title={The Sunspot Observations Made in 1979}, journal={Review of Faculty of Science, University of Istanbul}, year=1981, pages={199-223} }