Science Supplement how it works 1990 (Science Annual) Franklin watts / Grolier

Science Supplement 1994 how it works (Science annual) Grolier Inc.

Science Supplement 1993 how it works (Science Annual) [Franklin Watts / Grolier]

Science Supplement -how it works 1991 Science Annual [Franklin Watts / Grolier]

Science Supplement 1992 how it works (Science Annual) [Franklin Watts / Grolier]

Science Supplement how it works 1988 Science Annual [Franklin Watts , Grolier ]

Science Supplement how it works Spring 1998 Science annual [Webster's Unified]

Science Supplement 1996 how it works Science Annual [Grolier, 400pp.]