If the resume does not support it, write your cover letter in a bit more detail to support your interest and bring your resume with you when you interview. MBA Career Placement staff will be pleased to review and critique your letters. If you are zeroing in on a particular geographic area, i.e. New York, Baltimore, Atlanta, etc., it is best to work backward from the time you plan to be in the area. Your follow up phone call should involve some marketing on your part. It may take you several calls to get to the proper person.
Secretaries can be valuable allies.