NY: Silver Pixel Press, 1994. Schneider, Jason. "The Camera Collector: Schneider’s screw-mount SLR saga, part 1: Where did Praktica get its Pentax mount and was it such a Zeiss idea?" pp. 20, 23, 26. Modern Photography, Volume 51, Number 6; June 1987. Schneider, Jason. "A Half Century of The World’s Greatest Cameras!" pp. 56–59, 76, 124. Modern Photography, Volume 51, Number 9; September 1987. Schneider, Jason. "SLR Notebook: Recent Casualties: Vanishing Breed of SLR?" pp. 17–18. Modern Photography, Volume 52, Number 1; January 1988. External links Nakamura, Karen (2005). Asahi Pentax K1000. PhotoEthnography.com's Classic Cameras, retrieved on November 17, 2005. Manual available for download from the Pentax site (black and white). Manual Cameras: K1000 K1000 135 film cameras Articles containing video clips Pentax K-mount cameras