Yes, it is the lemon peel and therefore contains more than the juice itself. If you search for the values online they will vary due to region and quality of growth etc. but you will be able to get a general value.
Asked in Food Groups
What are foods that are members of the fruit group?
oranges, lemon and grapefruit are good sources of Vitamin C watermelon, papaya and cantaloupe contain Vitamin A. ...
Why is there not any vitamin c in boiled lemon juice?
This is because of high temperture will destroy vitamin C. :)