There are no national flags that have only two stars on them. However the following national flags have two stars on them: Panama St. Kitts and Nevis Sao Tome and Principe Syria
Flag descriptions and information can be found in many books about flags and online at places like CRWFlags and NationsOnline. These websites offer pictures and descriptions of flags along with their meanings.
George A. Miller has written: 'Prowling about Panama' -- subject(s): Description and travel
The Panama flag is divided into 4 rectangles arranged in two layers. The top layer starts with a white rectangle and blue star. The bottom layer has a blue rectangle and then a white rectangle with a red star.
A non-sealevel interoceanic canal designed to take all vessels known at the time of building.
There are two national flags for which this fits the description - the national flags of Lithuania, whose stripes are horizontal, and Guinea, whose stripes are vertical.
Mary A. Chatfield has written: 'Light on dark places at Panama' -- subject(s): Description and travel
May Pellaton Larsen has written: 'The forests of Panama' -- subject(s): Description and travel
You can also gain some insight from the DESCRIPTION of a flag, which occasionally includes some information on symbolism, in the CIA World Factbook.
C. W. Kilbey has written: 'Panama potpourri' -- subject(s): Description and travel, History
Louis Wagner has written: 'Panama-Kanal, Land und Leute' -- subject(s): Description and travel
Armand Reclus has written: 'Panama et Darien' -- subject(s): Description and travel, Indians of Central America