..............page:100-102
Lanthanide Contraction and its Effects
yang wei chun 1 ; xu gui ling 2 ; ma jun ying 1 (1.pingdingshan teachers college; pingdingshan; henan 467002; china; 2. shenma grouped limited company of china; pingdingshan; henan 467000; china)
..............page:47-50
..............page:73-75,88
..............page:103-104
On Diels-Alder Reaction
ma jun ying ; hou yan min (department of chemistry; pingdingshan teachers college; pingdingshan; henan 467002; china)
..............page:38-43