Jiminy Cricket's Encyclopedia

Here's another clip from the 1955 Mickey Mouse Club featuring Jiminy Cricket. Some of these Cricket edutainment shorts were really terrific...very well animated and extremely entertaining. This one is in black and white, but even so, the animation is simply irresistible to watch...the design is great, the movement cool and even the song by Jimmie Dodd is extremely catchy. I really love neat animation like this...it's just sad that there isn't more of this stuff being done today. I believe Disney vet Bill Justice Directed this as well as some other Jiminy Cricket shorts for the MMC.
Does anyone know who animated this?