@article {28167,
	title = {Using digital photogrammetry for pipe-works progress tracking},
	journal = {Canadian Journal of Civil Engineering},
	volume = {39},
	year = {2012},
	pages = {1062-1071},
	url = {https://doi.org/10.1139/l2012-055},
	author = {Mahmoud Ahmed and CT Haas and Ralph Haas}
}