வார்ப்புரு:Greenwood&Earnshaw1st
Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. ISBN 0-08-022057-6. {{cite book}}: Cite has empty unknown parameter: |1= (help)
Greenwood, Norman N.; Earnshaw, Alan (1984). Chemistry of the Elements. Oxford: Pergamon Press. ISBN 0-08-022057-6. {{cite book}}: Cite has empty unknown parameter: |1= (help)
