Sorghum and pearl millet disease identification handbook /

por Williams, Robert Joseph Paton 1926-, Williams, Robert Joseph Paton 1926-
Publicado 1978

The chemistry of evolution: the development of our ecosystem /

por Williams, Robert Joseph Paton 1926-, Williams, Robert Joseph Paton 1926-, Silva, J.J. R. Fraústo da
Publicado 2006

Principles and non metals

por Phillips, Courtanay Stanley Gross, Phillips, Courtanay Stanley Gross, Williams, Robert Joseph Paton 1926-

The biological chemistry of the elements: the inorganic chemistry of life /

por Silva, J.J. R. Fraústo da, Silva, J.J. R. Fraústo da, Williams, Robert Joseph Paton 1926-
Publicado 1991