Canada. Mines Branch
Bourane Zenaïdi Karray
Israel) Simpozyon be-khimiyah shimushit uve-handasah khimit (1st 1971 Aiyelet Hashaḥar
J. J. Schultz
Paulo Abib Andery
Anthony M. Opyrchal
Richard Lorey Day
John W. Sweeney
United States. Congress. Senate. Committee on Interior and Insular Affairs. Subcommittee on Minerals, Materials, and Fuels.
Resources Research Committee
Komaruddin As
Erwin Brandes
Joseph S. Coffman
Khimiḳalim u-fosfaṭim be-ʻe.m.
United States. Bureau of Labor
M. T Ryan
J. R. Adams
Australia. Commission of Inquiry into the Viability of the Christmas Island Phosphate Industry
M. T. Ryan
Maslyn Williams