The phrase "a wonderful source" is correct and usable in written English.
You can use it to describe something that provides valuable information, inspiration, or resources.
Example: "The book is a wonderful source of knowledge about ancient civilizations."
Alternatives: "an excellent resource" or "a great reference".
Personally, I think Oregon pinot gris is a wonderful source of good wine values.
Business people don't want to discuss the downside of immigration because they regard immigrants as a wonderful source of cheap labour.
Fish is a wonderful source of protein, not only for the growing populations of poor countries but also for the rich world's health-conscious consumers.
"The love of my friends is a wonderful source of fun in my life, but excuse me if I don't need it right now.
So I think that thinking about machines, and how to get purpose out of material, has been a wonderful source of insight.
The internet is a wonderful source of inspiration - and many creative ideas for ads pay a debt to random YouTube clips.
Property markets blossomed, giving the banks a wonderful new source of lending.
"Turkey vultures feed on carrion, and of course the interstate highway, with all the road kill, is a wonderful food source for them," Mr. Bochnik explained.
One unlikely wonderful source for material as of late for me has been the show "Louie," by comedian Louis C.K. To say he's irreverent would be underselling his shock value.
Those with whom the professor already has a working relationship, meaning other students, are wonderful sources of information on how the professor is or can be in given particular situations.
Most orange-yellow-red vegetables, such as squash, carrots, and pumpkin, contain vitamin A. Dark green veggies like kale, spinach, and lettuce are also wonderful sources of vitamin A. Vegetables are an important source of vitamin A by providing you with carotenoids like beta-carotene.
