This replaced the Physicians' Desk Reference in 2018. Now the PDR is 100% online and free.
First published in 1899 as a small reference book for physicians and pharmacists, The Manual grew in size and scope to become one of the most widely used comprehensive medical resources for professionals and consumers. As the Manual evolved, it continually expanded the reach and depth of its offerings to reflect the mission of providing the best medical information of the day to a wide cross-section of users, including medical professionals and students, veterinarians and veterinary students, and consumers.
Encyclopedia of Global Change by
Encompassing tsunamis, elephant conservation, ocean pollution, mining regulation, and permafrost melt, the 300 authoritative articles in this unique and wide-ranging encyclopedia investigate all types of phenomena that change life on Earth. The entries cover a range of general research categories: altered ecosystems, climate change, food and water supply, population, politics and global change, institutions and policies, biographies, and case studies.
The Grove Encyclopedia of Classical Art and Architecture by
The Grove Encyclopedia of Classical Art and Architecture is the most current and comprehensive reference resource for the visual arts of the Classical period. It features an abundance of in-depth articles on this field of enduring importance—from biographies to thematic entries on architecture, ceramics, metalwork, mosaics, painting and sculpture. The resource provides fascinating and authoritative art historical and cultural information about art forms, artists, rulers, philosophers, architecture, renowned works of art, archaeological sites and stylistic developments. Notable important subjects include the Apollo Belvedere, Carthage, the Euphronios krater, the Laokoon, Troy, the Venus de Milo and much more. Encompassing over four thousand years of artistry and innovation, this resource spans every art form, medium and civilization from Cycladic, Minoan, Helladic, and Etruscan art to the fall of the Roman Empire. Drawing upon the unparalleled scholarship in The Dictionary of Art (1996), and adding dozens of newly commissioned entries on recent archaeological discoveries, fully updated bibliography and over 600 illustrations, this publication sets a new standard in Classical studies. Less
The Oxford Encyclopedia of Latinos and Latinas in the United States by 
