G. Orbell

Petrology and clay mineralogy of some sedimentary rocks from the Mauriceville district

G. Orbell, 1965 .

Factors influencing dissolution of phosphate rock and oxidation of elemental sulphur in some New Zealand soils

G. Orbell, D. Lauren, J. H. Watkinson, 1987 .

Weathering sequence of soils from volcanic ash involving allophane and halloysite, New Zealand

M. Russell, R. Parfitt, G. Orbell, 1983 .