O*NET OnLine"O*NET OnLine has detailed descriptions of the world of work for use by job seekers, workforce development and HR professionals, students, researchers, and more!" (O*NET OnLine website)
Occupational Outlook Handbook (OOH)"The Occupational Outlook Handbook (OOH) is a career resource offering information on the hundreds of occupations that provide the majority of jobs in the United States." (OOH website)
Michigan Society of EchocardiographyThe MSE was founded in 1981 as an organization of physicians and sonographers involved in the art and science of cardiac ultrasound.
Society of Diagnostic Medical Sonography (SDMS)"The Society of Diagnostic Medical Sonography (SDMS) is a professional membership organization founded in 1970 to promote, advance, and educate its members and the medical community in the science of diagnostic medical sonography." (SDMS website)