Hawksworth, Frank G. Delbert Wiens, John A. Muir, Simon F. Shamoun, Laura E DeWald, Ignacio Vazquez Collazo books & textbook

Mistletoes of North American Conifers. General technical report of the Rocky Mountain Research Station : GTR-98 [USDA]

Hawksworth, Frank G. Delbert Wiens, John A. Muir, Simon F. Shamoun, Laura E DeWald, Ignacio Vazquez Collazo

Forest Service, U.S. Department of Agriculture /2002T Paperback