TY  - BOOK
AU  - 
TI  - Who did it first? / G. C. Thornley
T2  - Books in easy English
SN  - 0582531853
U1  - 428.64 
PY  - 1958///
CY  - London: 
PB  - Longman, 
KW  - INGLÉS
N1  - 1. Cuternberg and priting.-- 2. Jenner and smallpox.-- 3. Anesthetics.-- 4. Blood transfusion.-- 5. The cinema.-- 6. The top of the world.-- 10. Flying
ER  -