" "
" "
:
Ashenfelter O
,
Layard R
:
Handbook of labor economics
:
( ):
North-Holland Publishing Company
:
1986
:
:
1,2
:
Ashenfelter O., Layard R. Handbook of labor economics . Amsterdam: North-Holland Publishing Company. 1,2. 1986
:
: 11877, : 0, : 0.
© 2007.