3,484円 Undergraduate text uses combinatorial approach to accommodate both math majors and liberal arts students. Covers the basics of number theory, offers an outstanding introduction to partitions, plus chapters on multiplicativity-divisibility, quadratic congruences, additivity, and more

7,920円 This classic text and standard reference comprises all subjects of a first-year graduate-level course, including in-depth coverage of groups and polynomials and extensive use of categories and functors. 1989 edition.

5,940円 A classic text and standard reference for a generation, this volume covers all undergraduate algebra topics, including groups, rings, modules, Galois theory, polynomials, linear algebra, and associative algebra. 1985 edition.

4,950円 This field guide features detailed descriptions of 455 species of trees native to eastern North America, including the Midwest and the South. The 48 color plates, 11 black-and-white plates, and 26 text drawings show distinctive details needed for identification. Color photographs and 266 color ra...

3,564円

1,633円 This Peterson First guide contains easy-to-understand answers to questions about the weather, such as why the sky is blue, what makes it rain, and what causes rainbows. The book also features 116 color photographs that show how to identify clouds, with explanations of what each cloud type tells a...

4,752円 Grouped by color and by plant characteristics, 1,293 species in 84 families are described and illustrated. Included here are all the flowers you're most likely to encounter in the eastern and north-central U.S., westward to the Dakotas and southward to North Carolina and Arkansas, as well as the ...

1,485円 Now there is a guidebook to trees--one of the most popular subjects in the Peterson Field Guide series--for the beginning naturalist. The 243 trees are grouped into six categories by leaf type and arrangement, making it easier for the beginner to identify unknown species. 200 color illustrations.

3,960円 Informative travel companions about roadside terrain and geology with photos, diagrams, and glossary.

5,544円 325 of the Great Plains most abundant or notable bird species 325 range maps Quick reference guide Map of best birding sites Glossry of terms Color-coded guide to bird groups on back cover

1,336円 An overview of the geology of the Earth, including its relation to the rest of the universe, the rocks and minerals of which it is made, and the effects of glaciers, gravity and other forces on the Earth.

1,336円 This field guide to the sky provides charts, tables, and instructions for the amateur astronomer on how, where, and when to observe stars, constellations, and planets. Also discusses meteors, comets, eclipses, and other celestial objects.