Inventions and Discovery

Jonas Salk and the Polio Vaccine by Katherine Krohn

Jonas Salk and the Polio Vaccine

Inventions and Discovery

Katherine Krohn

32 pages • missing pub info (editions)

nonfiction autobiography biography childrens historical science technology
Madam C. J. Walker and New Cosmetics by Katherine Krohn

Madam C. J. Walker and New Cosmetics

Inventions and Discovery

Katherine Krohn

32 pages • missing pub info (editions)

nonfiction autobiography biography childrens historical history science technology medium-paced
More...