When a Second Seems an Age von Risdon, P. J

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Fighting a Mud Run von Risdon, P. J.

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When a Second Seems an Age: Filming Rapidly Moving Objects by Means of the Heape and Gryll Rapid Cinema Machine von P. J Risdon

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Shifting Speeds with an Oil Pump: Some Details of a New British Variable-Speed Gear Without Gear-Wheels von P. J. Risdon

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Shifting Speeds With An Oil Pump von Risdon, P. J.

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The Wembley ParK Stadium: Built in London, the Largest Sports Arena to Date, with a Capacity of 125,200 People von P. J. Risdon

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The Wembley Park Stadium von Risdon, P. J.

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When the Camera Turns Sculptor von Risdon, P. J.

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When the Camera Turns Sculptor: An Ingenious Combination of Magic Lantern, Camera and Carving Machine for Photo-Sculpture von P. J. Risdon

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Irrigation in Australia: The Murrumbidgee Project, with Storage Capacity for 200 Billion Gallons von P. J. Risdon

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Irrigation in Australia von Risdon, P. J.

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The St. Gothard Electrification: Taking the Inefficient and Smoky Steam Locomotive Out of Europe's Greatest Tunnel von P. J. Risdon

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The Sydney Harbor Bridge von Risdon, P. J.

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The Sydney Harbor Bridge: An Australian Engineering Work of the First Magnitude von P. J. Risdon

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The St. Gothard Electrification von Risdon, P. J.

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When Steel Beams Stretch: A New Instrument for Observing and Photographing Stresses in Iron and Steel von P. J. Risdon

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When Steel Beams Stretch von Risdon, P. J.

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Roentgen-Ray Photography: Some Recent Applications of the X-Ray, and Some Bizarre Results von P. J. Risdon

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Roentgen-Ray Photography von Risdon, P. J.

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Childhood reflux and urinary infection : A follow-up of 10-41 years in 226 adults von SMELLIE, J. M, PRESCOD, N. P, SHAW, P. J, RISDON, R. A, BRYANT, T. N

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