America, history and life 1990-
Biological abstracts 1991-
Chemical abstracts -1991
Computer & control abstracts 1991-
Electrical & electronics abstracts 1991-
Historical abstracts. Part A. Modern history abstracts 1990-
Historical abstracts. Part B. Twentieth century abstracts 1990-
Mathematical reviews
MLA international bibliography of books and articles on the modern languages and literatures (Complete edition)
Physics abstracts 1991-