Having all the reflexes of the feet on the same chart can be confusing, especially when someone is new to reflexology. Therefore, a few years ago I drew my own charts, creating a separate chart for each specific body system. I think the reflexes for each system are much easier to understand and identify when isolated.
There are charts for eleven of the twelve body systems, with no chart for the Integumentary system.
Find them under the Charts tab on my website.
These charts are also available on my Facebook page, Holistic Reflexology.
Hope they are helpful.