Lots of resources
Start with family members who have allergies
I like to say that "noses run in families" (allergy joke). So who's helping them with their allergies? Next your primary care physician - a trustworthy, knowledgeable resource. You can call your county medical society for names or find an allergist at www.Aaaai.Org & www.Acaai.Org. Think twice about those who advertise.