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Classification 2025 Winter Edition

Worldwide source of medical classification resources

Class Index

non-alpha A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
In epidemiology
WA 950
Psychology
BF 39
Research
(Form number 20 or 20.5 in any NLM schedule where applicable)
See also specific types of surveys
Special topics, by subject