Western (Aechmophorus occidentalis) and eared (Podiceps nigricollis) grebes of central Alberta: 2004 field summary

Berg, G.; Wilkinson, L.; Wollis, H.; Prescott, D.

Alberta Species at Risk Report, 94 i-vi, 7-23

2004

https://eurekamag.com/research/024/132/024132933.php