Powers Ph.D., Don books & textbook
Mark Twain - Astronomy, Grades 6 - 12 (Expanding Science Skills Series)
Powers Ph.D., Don Beaver Ph.D., John B.
Mark Twain Media /2010-01-04 Paperback / 80 Pages
isbn-10: 1580375286 / isbn-13: 9781580375283
Mark Twain - Meteorology, Grades 6 - 12 (Expanding Science Skills Series)
Logan, La Verne Powers Ph.D., Don
Mark Twain Media /2010-01-04 Paperback / 80 Pages
isbn-10: 1580375278 / isbn-13: 9781580375276
Electricity and Magnetism, Grades 6 - 12: Static Electricity, Current Electricity, and Magnets (Expanding Science Skills Series)
Beaver Ph.D., John B. Powers Ph.D., Don
Mark Twain Media /2010-01-04 Paperback / 80 Pages
isbn-10: 1580375251 / isbn-13: 9781580375252
Electricity & Magnetism, Grades 5 - 8 (Connecting Students to Science)
Beaver Ph.D., John B. Powers Ph.D., Don
Mark Twain Media /2003-01-01 Paperback / 80 Pages
isbn-10: 1580372228 / isbn-13: 9781580372220
Solar System, Grades 5 - 8
Powers Ph.D., Don Beaver Ph.D., John B.
Mark Twain Media /2004-04-01 Paperback / 80 Pages
isbn-10: 1580372783 / isbn-13: 9781580372787
