There are different types of red brick i.e. Based on manufacturing method and shape of brick. They are commonly used since these are economical & easily available.
Thermal Conductivity of Clay Bricks
30+ Masonry Tools Used in Masonry Work of Your Home!
What is the Best Way to Make Red Bricks?, by Bricks Company UK
Red Clay Hand Made Bricks, 9 in x 4 in x 3 in at Rs 6/piece in Tiruvallur
30+ Masonry Tools Used in Masonry Work of Your Home!
AAC Blocks Vs Red Bricks, PDF, Brick
Diagram of clay brick manufacturing scheme.
Bricks and the Industrial Revolution - by Brian Potter
Clay Bricks — Design Life-Cycle
How brick is made - material, production process, manufacture, making, used, processing, dimensions
Construction Cost in Bangalore