If you call, ask if it's convenient to talk. Introduce yourself and who referred you. Ask if they have openings. If so, get details of the position, adjust your resume accordingly and apply. If not, ask if they can refer you to someone else.
Newspapers list many jobs.
LDS Business College Career Services Center. The center serves students and alumni. Ward employment specialists. An underused resource that often has many listings. Details are listed in the newspaper and on the radio or television.