TY  - BOOK
AU  - Piggott, W.
AU  - Rawer, K.
TI  - URSI handbook of ionogram interpretation and reduction of the world wide soundings committee
U1  - 551.510.53.1(02)/P55 
PY  - 1961///
CY  - Amsterdam
PB  - Elservier Publishing Company
KW  - METEOROLOGÍA
KW  - CIENCIAS DE LA TIERRA
N1  - 1. Introduction -- 2. Fundamental considerations and definitions -- 3. Determination of hourly numerical values -- 4. Qualifying and descriptive letters -- 5. Es characteristics -- 6. The f plot -- 7. Daily tabulation of hourly values -- 8. Monthly tables of data, medians and quartiles
ER  -