@article {20677,
	title = {Effect of some lignosulphonate additives on the properties of gypsum panels },
	journal = { Pakist. J. Sc. Ind. Research },
	volume = {30},
	year = {1987},
	pages = {32-37},
	author = {A.M. Khater and M. F. Abadir and I.A. Khattab}
}
