TY  - BOOK
AU  - Hemming S.
ED  - Heunelink E.
TI  - Proceeding of the Seventh International Symposium on Light in Horticulture Systems Acta Hort No. 956
U1  - 635 
PY  - 2012///
CY  - Belgium 
PB  - ISHS Secretariat 500, 3001 Leuven
ER  -