Journal of Liaoning Petrochemical University
 
Noncomplete Digestion-Spectrophotometric Determination of Calcium in Lubricating Oil
SHEN Chun-yu
Journal of Liaoning Petrochemical University . 2011, (2): 17 -19 .  DOI: 10.3696/j.issn.1672-6952.2011.02.0060