Puerto Rico : Commonwealth election law and its application to a political status referendum : report to the Chairman, Committee on Energy and Natural Resources, U.S. Senate /

Running title : Puerto Rico's status referendum.

Puerto Rico : update of selected information contained in a 1981 GAO report : fact sheet for the Chairman, Committee on Energy and Natural Resources, U.S. Senate /

"B-234765"--P. 1.

Performance of historic stone building materials and systems : observations by architects, engineers and building conservators : excerpts from workshop discussions held on August 10, 1987, funded by the U.S. Environmental Protection Agency and the U.S. Department of the Interior, National Park Service, Cultural Resources Acid Rain Research Program.

"June 1988."