TY - BOOK ID - 140008596 TI - Physics of the lower ionosphere AU - Poppoff, Ilia George AU - Whitten, R. C. PY - 1965 PB - Englewood Cliffs, N. J Prentice-Hall DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:140008596 AB - ER -