Nǣosō̜n wichā thahān sư̄sān79 lēm 1
By: dōi Lūang Wō̜rayutthawichai.
Edition: Phim khrang thī nưng.
Publisher: Krom Yutthasưksā Thahān Bok
Published: 1936
Place of publication: [Bangkok]
Language: tha
Number of pages: 248
Description: Guidance for a teaching on signalling education.
Notes: In Thai.