TY  - GEN
AU  - Piggott,  W.
TI  - URSI Handbook of Ionogram interpretation and reduction of the world wide soundings comittee
PY  - 1961///
CY  - Amsterdam
PB  - Elsevier Publ. Co
KW  - FISICA E QUIMICA DA ATMOSFERA
KW  - IM
ER  -