Title: Book Science
Description: Tsvetkova, Milena. Book Science. Sofia: Enthusiast, 2018. 700 p. ISBN 978-619-164-267-0 
Цветкова, Милена. Наука за книгата. София:  Enthusiast, 2018. 700 с. ISBN 978-619-164-267-0 

*UDC (Universal Decimal Classification)*
002.19 Books. Writings
028.02 Reading psychology
316.77 Sociology of communication
655 Printing. Publishing. Book Trade
*DDC (Dewey Decimal Classification)*
002 The book 
028 Reading & use of other information media
070 News media, journalism & publishing
*LCC (Library of Congress Classification)*
Z4-115.5 Books (General)
Z1003-1003.5 Books and reading
LB1049.9-1050.75 Reading (General)
P87-96 Communication. Mass media
*ГРНТИ = State Rubricator of Scientific and Technical Information*
19.51.45 Book science 
19.51.41 Psychology of readers 
15.81.49 Psychology of reading 
19.21 Mass communications. Mass media
Subjects: Book science, Book Studies, Research of book, Media studies, Communication studies, Communication and Media Research, Reading, Books and reading, Books and reading, history, Psychology of Reading