Серебренников А. Химик в цифрах и фактах 1953/54 - 2005/06. 2006. 200 с.

$0.19

$4.53

$12.93

$148.71

$6.47

$34.92

$0.55

$10.33

$15.52

$5.16

$3.88

$1.29

$36.21

$24.57

$0.26

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$45.25