TY  - RPRT
TI  - The decrease of Lake Chad as documented during twenty years of manned space flight
AU  - Mohler, Robert R. J.
AU  - Helfert, Michael R.
AU  - Giardino, John R.
PY  - 1989
UR  - https://ntrs.nasa.gov/citations/19890054063
ID  - 19890054063
ER  -