Science year 1990. : The World Book annual science supplement. A review of science and technology during the 1989 school year.

Science year 1992. : The World Book annual science supplement. A review of science and technology during the 1991 school year.

Science year 1993. : The World Book annual science supplement. A review of science and technology during the 1992 school year.

Science year 1995. : The World Book annual science supplement.

Science year 1991. : The World Book annual. Science supplement.

The 1996 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1995.

Yearbook of science and the future 1996.

Science annual 1994. /

Science year 1990. The World Book annual science supplement. A review of

Science year 1992. The World Book annual science supplement. A review of

The 1994 World Book year book. : The annual supplement to The World Book encyclopedia.

The 1993 World Book. Year Book. : The annual supplement to the World Book encyclopedia. /

Mac Graw-Hill yearbook of science and technology 1996. : Comprehensive coverage of recent events and research as compiled by the Staff of the McGraw-Hill encyclopedia of science and technology.

Britannica book of the year 1996.

The 1989 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1988.

The 1990 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1990.

The 1991 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1990.

The 1993 World Book year book. : The annual supplement to The World Book encyclopedia. A review of the events of 1992.

The Hammond Barnhart dictionary of science. /

1993. Yearbook of science and the future /