perlego.com 的前十大競爭對手

yumpu.com

YUMPU releases magazines, documents and catalogs on the internet. Publish for free. Gain new readers and costumers worldwide.

wiley.com

Discover educational resources from Wiley to support your journey—whether you’re a student, educator, researcher, or professional. Learn more.

archive.org

internet archive is a non-profit digital library offering free universal access to texts, movies & music, as well as 624 billion archived web pages.

taylorfrancis.com

Stop poverty in all its forms. Eradicate extreme poverty for all people everywhere. Reduce at least by half the proportion of men, women and children of all

dokumen.pub

This book covers lignin, a renewable source of carbonaceous material derived from biomass, which is a subject of researc...

researchgate.net

Access 160+ million publication pages and connect with 25+ million researchers. Join for free and gain visibility by uploading your research.

libgen.is

library genesis is a scientific community targeting collection of books on natural science disciplines and engineering.

semanticscholar.org

Semantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help Scholars discover relevant research.

openlibrary.org

2-Minute Garfield Stories (Two-Minute Stories) by Jim Davis, unknown edition,