Grabowska, B., Holtzer, M., Kot, I. and Kwaśniewska-Królikowska, D. (2011) “SPECTROPHOTOMETRY APPLICATION FOR THE MONTMORILLONITE CONTENT DETERMINATION IN MOULDING SANDS WITH BENTONITE”, Metallurgy and Foundry Engineering, 37(1), p. 73. doi: 10.7494/mafe.2011.37.1.73.