KINETICS OF OIL SHALE PYROLYSIS IN AN AUTOCLAVE UNDER NON-LINEAR INCREASE OF TEMPERATURE; pp. 273–288

MODIFICATION OF GAS BLOWER TO ENHANCE THE CAPACITY OF FUSHUN OIL SHALE RETORT; pp. 289–293

ASSESSMENT OF EXTERNAL COSTS IN OIL SHALE-BASED ELECTRICITY PRODUCTION IN ESTONIA; pp. 295–308

FORMATION OF SULPHIDE AND ITS CHEMICAL EQUILIBRIUM IN SEWAGE PIPES. INFLUENCE OF H₂S TO AEROBIC MICROORGANISMS OF ACTIVATED SLUDGE; pp. 309–319

SOME RESULTS OF THE AFFORESTATION OF CLOSED OIL SHALE OPENCASTS WITH EXOTIC CONIFERS; pp. 321–331

POLYCHLORINATED BIPHENYLS (PCB), POLYCHLORINATED DIBENZO-P-DIOXINS (PCDD) AND DIBENZOFURANS (PCDF) IN OIL SHALE AND FLY ASH FROM OIL SHALE-FIRED POWER PLANT IN ESTONIA; pp. 333–339

URANIUM PRODUCTION FROM IMPORTED RAW MATERIAL AT SILLAMÄE IN 1949–1989; pp. 341–355