TY  - GEN
TY  - GEN
T1  - Asymptotic double photoexcitation cross sections of the helium atom
T2  - Laboratory of physics : Technical university of Helsinki
A1  - Åberg, T., 1937-2000
LA  - eng
PP  - Otaniemi,
YR  - 1970
UL  - https://kansalliskirjasto.finna.fi/Record/fikka.3403312
NO  - Moniste.
ER  -