Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1 957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con­ cerned if the printing and distribution of the volumes were handled by an interna­ tional publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor­ poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 36 (thesis year 1991) a total of 11,024 thesis titles from 23 Canadian and 161 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work. While Volume 36 reports theses submitted in 1991, on occasion, certain univer­ sities do report theses submitted in previous years but not reported at the time.

Masters Theses Listed by Study Discipline.- 1. Aerospace Engineering.- 2. Agricultural Economics, Sciences, and Engineering.- 3. Architectural Engineering and Urban Planning.- 4. Astronomy.- 5. Astrophysics.- 6. Ceramic Engineering.- 7. Chemical Engineering.- 8. Chemistry and Biochemistry.- 9. Civil Engineering.- 10. Communications Engineering and Computer Science.- 11. Cryogenic Engineering.- 12. Electrical Engineering.- 13. Engineering Mechanics.- 14. Engineering Physics.- 15. Engineering Science.- 16. Fuels, Combustion, and Air Pollution.- 17. General and Environmental Engineering.- 18. Geochemistry and Soil Science.- 19. Geological Sciences and Geophysical Engineering.- 20. Geology and Earth Science.- 21. Geophysics.- 22. Industrial Engineering and Operations Research.- 23. Irrigation Engineering.- 24. Marine and Ocean Engineering.- 25. Materials Science and Engineering.- 26. Mechanical Engineering and Bioengineering.- 27. Metallurgy.- 28. Meteorology and Atmospheric Science.- 29. Mineralogy and Petrology.- 30. Mining and Metallurgical Engineering.- 31. Missile and Space Systems Engineering.- 32. Nuclear Engineering.- 33. Nuclear Physics.- 34. Nuclear Science.- 35. Oceanography and Marine Science.- 36. Petroleum and Natural Gas Engineering.- 37. Photogrammetric and Geodetic Engineering.- 38. Physics and Biophysics.- 39. Plastics Engineering.- 40. Wood Technology, Forestry, and Forest Science.- 41. Reactor Science.- 42. Sanitary Engineering, Water Pollution and Resources.- 43. Textile Technology.- 44. Transportation Engineering.- Theses without Specification of School or Department.