Title

Formulas on blackboard.

Caption

Formulas on blackboard.

Info+

Photo Tom Grill

Date

2012

Credit line

Photo12/Tetra Images

Reference

TTM12A35_467

Model release

No

License type

Royalty free

Available size

50.0Mb (1.4Mb) / 17.2in x 11.3in / 5155 x 3391 (300dpi)

Keywords

Education Classroom Blackboard Chemistry Formula School Science Number Connection Molecule Equations Complexity Western Script Horizontal Indoors Day No People