His Elements of photogrammetry, 1974.

Brinker, R.C. Elementary surveying, 1983, c1984 (a.e.) CIP t.p. (Paul R. Wolf) data sheet (Wolf, Paul Richard; b. 6/13/34)

Information from 678 field, converted June 12, 2020 (Ph. D.; prof. civil & environmental engr., Univ. Wis., Madison)