w21.07 pp. 30-31

g05 4/22 pp. 16-18

g05 5/22 pp. 12-14

w18.04 pp. 30-31

mwb22.03 p. 9

w15 10/15 pp. 30-32

g 5/13 pp. 8-9

g 1/12 pp. 10-13

g 5/12 pp. 26-28

w11 8/15 pp. 3-5

km 7/07 p. 3

g 3/07 pp. 4-7

g04 12/8 pp. 18-21

g03 2/8 p. 31

g21 No. 2 pp. 7-9

g 5/14 pp. 8-9

g 10/08 pp. 4-7

ijwyp article 81 pars. 3-5

ijwyp article 67

ijwyp article 73

g 7/11 pp. 24-27

yp2 chap. 11

g05 4/22 pp. 16-18

g05 5/22 pp. 12-14

g05 9/22 pp. 19-21

g05 10/22 pp. 17-19