Health effects of a wastewater treatment system /

Issued Oct. 1978.

A view of the structure, functions, and disorders of the stomach and alimentary organs of the human body : with physiological observations and remarks upon the qualities and effects of food and fermented liquors /

Mode of access: Internet.

Research advances, opportunities, and needs in digestive diseases : a report of the National Digestive Diseases Advisory Board /

Mode of access: Internet.