TY  - BOOK
ED  - MCGRAW HILL ENCYCLOPEDIA OF SCIENCE AND TECHNOLOGY
TI  - McGraw- Hill Yearbook of Science and Technology
U1  - Ak73,N 
PY  - 1969///
CY  - NEW DELHI
PB  - McGraw-Hill book company
KW  -  SCIENCE AND TECHNOLOGY
KW  - MCGRAW YEARBOOK OF SCIENCE AND TECHNOLOGY
ER  -