Grey hair professor holding book and pointing on something at blackboard — Stock photos

"Grey hair professor holding book and pointing on something at blackboard" is a stock image by IgorVetushko. It’s available in the following resolutions: 1000 x 667px, 2000 x 1335px, 7360 x 4912px. The minimum price for an image is 2.99$. Image in the highest quality is 7360 x 4912px, 300 dpi, and costs 9.99$.