This paper analyzes the job advertisements that appeared in "MLA News" (a publication of the Medical Library Association) from January 1991 through December 1991. It replicates two earlier studies, in 1977-78 and 1986, and compares results. Each of the 179 job advertisements for 1991 was studied for: (1) administrative level; (2) area of expertise; (3) job qualifications, including a Master's Degree in Library Science; (4) foreign languages; (5) years of experience; (6) MLA certification; (7) additional academic degrees and subject background; (8) geographic locations; and (9) compensation, including salary and fringe benefits. Qualifications deemed most important are identified. As in 1986, qualifications beyond professional library skills, such as communications and teaching skills, were increasingly important. Only nine percent of jobs asked for MLA certification, and only one percent required it. Subject area background was the area most requested. An appendix contains the content analysis coding form, and there are 11 tables of data. (Contains 10 references.) (SLD)