@book{112326,
	author = {Ahsan, Mohammad},
	title = {Some problems on fermi age in beryllium and beryllium oxide /},
	publisher = {University of Dhaka,},
	year = {1969.},
	address = {Dhaka :},
	note = {Thesis (Phd ) -- Department of Physics, University of Dhaka, 1969.}
}