Adsorption at the gas-solid and liquid-solid interface: proceeding of an International Symposium held in Aix-en-provence (September 21-23, 1981)

China official annual report 1981

Algorithmic Language: proceeding of The International Symposium on Algorithmic Language (Amsterdam, The Netherland: 26-29 October 1981)

Advances in geophysics vol.25 : Theory of climate (Proceedings of a Symposium commemorating the two-hundreth anniversary of the academiy of sciences pf Lisbon October 12-14, 1981, Lisbon, Portugal

1981 annual report P.T. Eternit Gresik