TY  - BOOK
ED  - United States.
TI  - General notions of organization and tactical suggestions indispensable to the balloon observer,
AV  - UG643 .A5 1918b
PY  - 1918///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Balloons
KW  - Tracking
KW  - Aeronautics, Military
KW  - Air warfare
N1  - Supplemented by:  Supplement to the pamphlet entitled General notions of organization ... indispensable to the balloon observer... Washington, Govt. print. off., 1918.  15 p. tables. 18 cm; On title page of supplement:  This Supplement is intended to supersede Part 1 of the pamphlet, which is erroneous in that it is not up to date
ER  -