TY  - BOOK
AU  - Mullis,Ina V.S.
AU  - Michael o. martin,ann m. kennedy,kathleen l.trong,marian sainsbury
TI  - PIRLS 2011: Assessment framework
U1  - 379.24 23rd ed.
PY  - 2011///
CY  - Netherlands
PB  - TIMSS & Pirls
KW  - Trends
ER  -