TY  - GEN
TY  - GEN
T1  - The concept of activity in Soviet psychology
A2  - Wertsch, James V.
LA  - eng
PP  - Armonk, N. Y.
PB  - Sharpe
YR  - 1981
UL  - https://kansalliskirjasto.finna.fi/Record/fikka.31730
SN  - 0-87332-158-8 sidottu
ER  -