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Fun machines :
step-by-step science activity projects from the Smithsonian Institution.

APA Citation

Smithsonian Institution. (1993). Fun machines: step-by-step science activity projects from the Smithsonian Institution. Milwaukee: G. Stevens.

MLA Citation

Smithsonian Institution. Fun Machines: Step-by-step Science Activity Projects From the Smithsonian Institution. Milwaukee: G. Stevens, 1993.

Warning: These citations may not always be complete (especially for serials).