1988

1998

Blackwell

31.72

30.16

Churchill Livingston*

34.00

31.20

Elsevier

30.08

27.92

Harcourt

50.51

53.23

Karger

28.81

22.77

Mosby*

94.50

96.55

Plenum*

27.61

22.89

Springer

21.60

19.03

Taylor

11.67

12.08

Thomson*

13.50

19.42

Waverly*

61.67

63.41

Wiley

24.41

23.51

Wolters Kluwer

41.62

42.28

Unweighted Averages

36.28

35.73

Notes

1. Numbers based on holdings for 194 medical libraries, during 1988-1998 period.

2. All titles commenced publication prior to 1989

3. Firms marked with an asterisk (*) were acquired in mergers with other firms in the list during 1997–1998.