CHEMnetBASE This link opens in a new windowOnline reference books produced by Chapman & Hall/CRC Press. Includes the Handbook of Chemistry and Physics, Combined Chemical Dictionary (CCD), Dictionaries of Natural Products, Organic Compounds, Drugs, Inorganic and Organometallic Compounds, Commonly Cited Compounds, Marine Natural Products, Food Compounds, Carbohydrates, Polymers: A Property Database, and Properties of Organic Compounds (POC).