Mustefa, Abdurahim O., Yasseen M. Abdulla, and Mohammed H. Sallow. 2018. “THE EFFECT OF QUEEN AGE AND QUEEN EXCLUDER ON SOME BIOLOGICAL ACTIVITY OF HONEYBE (Apis Mellifera) COLONIES ”. Diyala Agricultural Sciences Journal 10 (2):36-47. https://journal.djas.uodiyala.edu.iq/index.php/dasj/article/view/1152.