Water and the world od Tweedie, Alan D.

Opinion on the breadth of the territorial sea.

Agusan river basin, Mindanao Island, Philippines

Water od Leopold, Luna B

Water boatman caddis fly and water spider od Ladyman, Phyllis

Death of the sweet waters od Carr, Donald Eton 1903-

Standard handbook of salt-water fishing od Scharff, Robert

Plan of development of Ministry of Land, Irrigation and Power, 1966-1970.

Bulletin of Environmental Contamination and Toxicology [ejournal].

Dokumenty pełnotekstowe

A report on the Cagayan River Basin, Luzon Island, Philippines.