Environmental health and sanitation /
Environmental health and sanitation /
by K. K. Beri ... [et al.] ; edited, typed and illustrated by M. G. Wallis.
- [Port Moresby] : Dept. of Public Health, [1972].
- 71 leaves : ill.
Environmental health--Papua New Guinea.
Hygiene.
Sanitation--Papua New Guinea.
Environmental health--Papua New Guinea.
Hygiene.
Sanitation--Papua New Guinea.