compiled by staff of the Royal Dutch/Shell Group of Companies

Elsevier , Distributors for the United States and Canada, Elsevier Science Pub. Co. 1983 6th ed

: u.s.

Available at 5 libraries

Shell Petroleum 1952 2nd ed

Available at 2 libraries

Royal Dutch Petroleum Company (N.V. Koninklijke Nederlandsche Petroleum Maatschappij)

Royal Dutch Petroleum Company 1951-

1951 , 1959 , 1961 , 1975

Available at 1 libraries

Mouton 1950

Available at 24 libraries

compiled by members of the staff of the Royal Dutch-Shell Group

Asiatic Petroleum Co., Ltd., 1938 2nd ed

Available at 3 libraries

Willemsen 1911 2de druk

Available at 1 libraries