V. Uma*, V. Chaitra, K.S. Shamala,. 2011. “Construction of Versatile Advanced Micro Processor Based Controller for Spray Pyrolysis Unit and Study of Characterization of Nano Crystalline Tin Oxide (SnO2) Thin Films”. Recent Research in Science and Technology 3 (10). https://www.updatepublishing.com/journal/index.php/rrst/article/view/807.