Collings, W. Z. (2000). The complete pedigree charts of Walter Zane Collings (1935-xxxx): Having roots in old Philadelphia Co., PA, old Gloucester Co., NJ, Lancaster Co., PA, Cecil Co., MD, and New Castle Co., DE; plus the countries of England, Wales, Ireland, France, Germany and other places. Newark, DE: W.Z. Collings.

Collings, Walter Zane. The Complete Pedigree Charts of Walter Zane Collings (1935-xxxx): Having Roots in Old Philadelphia Co., PA, Old Gloucester Co., NJ, Lancaster Co., PA, Cecil Co., MD, and New Castle Co., DE; Plus the Countries of England, Wales, Ireland, France, Germany and Other Places. Newark, DE: W.Z. Collings, 2000.

Collings, Walter Zane. The Complete Pedigree Charts of Walter Zane Collings (1935-xxxx): Having Roots in Old Philadelphia Co., PA, Old Gloucester Co., NJ, Lancaster Co., PA, Cecil Co., MD, and New Castle Co., DE; Plus the Countries of England, Wales, Ireland, France, Germany and Other Places. Newark, DE: W.Z. Collings, 2000.