TY  - BOOK
AU  - Diagram group
TI  - comparisons
SN  - 0312154844
PY  - 1980///
CY  - New York
PB  - ST. Martin's Press , 
KW  - Physical measurements
N1  - Includes index
UR  - https://books.google.com.pk/books?id=hChjD0JYcPcC&dq=0312154844&hl=en&sa=X&ved=2ahUKEwjQ0bHMjPf0AhUNfMAKHdx-AhMQ6AF6BAgHEAE
ER  -